diff --git a/app/src/main/java/com/utsmm/kbz/MainFragment.java b/app/src/main/java/com/utsmm/kbz/MainFragment.java
index 55bd380..9b1a4de 100644
--- a/app/src/main/java/com/utsmm/kbz/MainFragment.java
+++ b/app/src/main/java/com/utsmm/kbz/MainFragment.java
@@ -4,18 +4,25 @@ import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager;
 
 import android.os.Bundle;
+import androidx.appcompat.app.AlertDialog;
 
 import android.os.RemoteException;
 import android.text.TextUtils;
 import android.util.Log;
+import android.util.TypedValue;
 import android.view.View;
+import android.view.Gravity;
 import android.widget.Toast;
+import android.widget.LinearLayout;
+import android.widget.TextView;
 
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 
 import androidx.lifecycle.Observer;
+import androidx.appcompat.widget.AppCompatButton;
+import androidx.core.content.ContextCompat;
 
 import com.denzcoskun.imageslider.ImageSlider;
 import com.denzcoskun.imageslider.constants.ScaleTypes;
@@ -68,6 +75,7 @@ import java.nio.charset.StandardCharsets;
 
 import java.util.ArrayList;
 import java.util.Date;
+import java.util.LinkedHashSet;
 
 import java.util.List;
 import java.util.Objects;
@@ -97,6 +105,13 @@ public class MainFragment extends DataBindingFragment {
     private final ArrayList<SlideModel> imgList = new ArrayList<>();
     private Observer<PayDetail> observeLastTrans;
     private PayDetail lastPay;
+    private boolean cardPrimaryHostCached = false;
+    private String cardPrimaryHostName = "";
+    private String cardPrimaryTid = "";
+    private String cardPrimaryMid = "";
+    private String cardPrimaryIp = "";
+    private String cardPrimarySecIp = "";
+    private CurrencyType cardPrimaryCurrency = CurrencyType.MMK;
 
     @Inject
     EmvParamOperation emvParamOperation;
@@ -420,6 +435,200 @@ public class MainFragment extends DataBindingFragment {
 
     }
 
+    private void startCardSaleFlow() {
+        processBatch();
+        sharedViewModel.transactionsType.setValue(TransactionsType.SALE);
+        sharedViewModel.setTransMenu(TransMenu.SALE);
+        sharedViewModel.processCode.postValue(ProcessCode.SALE_PURCHASE + ProcessCode.SMART + ProcessCode.TO_ACCOUNT);
+        navigateToAmount();
+    }
+
+    private void showCurrencyChooserForCardSale() {
+        List<String> currencies = getAvailableCardSaleCurrencies();
+        if (currencies.isEmpty()) {
+            applyCardCurrencyAndHost("MMK");
+            startCardSaleFlow();
+            return;
+        }
+
+        if (currencies.size() == 1) {
+            applyCardCurrencyAndHost(currencies.get(0));
+            startCardSaleFlow();
+            return;
+        }
+
+        showCurrencyPickerDialog("Choose Currency", currencies, currency -> {
+            applyCardCurrencyAndHost(currency);
+            startCardSaleFlow();
+        });
+    }
+
+    private List<String> getAvailableCardSaleCurrencies() {
+        cachePrimaryCardHostIfNeeded();
+        LinkedHashSet<String> values = new LinkedHashSet<>();
+
+        if (cardPrimaryCurrency != null && !TextUtils.isEmpty(cardPrimaryCurrency.name)) {
+            values.add(normalizeCurrency(cardPrimaryCurrency.name));
+        }
+
+        String secondaryCurrency = normalizeCurrency(SystemParamsOperation.getInstance().getThirdHostCurrency());
+        if (!TextUtils.isEmpty(SystemParamsOperation.getInstance().getThirdHostName()) && !TextUtils.isEmpty(secondaryCurrency)) {
+            values.add(secondaryCurrency);
+        }
+
+        return new ArrayList<>(values);
+    }
+
+    private void applyCardCurrencyAndHost(String selectedCurrency) {
+        cachePrimaryCardHostIfNeeded();
+
+        String selected = normalizeCurrency(selectedCurrency);
+        String secondaryCurrency = normalizeCurrency(SystemParamsOperation.getInstance().getThirdHostCurrency());
+
+        boolean useSecondaryCardHost = !TextUtils.isEmpty(SystemParamsOperation.getInstance().getThirdHostName())
+                && !TextUtils.isEmpty(secondaryCurrency)
+                && secondaryCurrency.equals(selected);
+
+        if (useSecondaryCardHost) {
+            SystemParamsOperation.getInstance().setHostName(SystemParamsOperation.getInstance().getThirdHostName());
+            SystemParamsOperation.getInstance().setTerminalId(SystemParamsOperation.getInstance().getThirdHostTerminalId());
+            SystemParamsOperation.getInstance().setMerchantId(SystemParamsOperation.getInstance().getThirdHostMerchantId());
+            SystemParamsOperation.getInstance().setIpAddress(SystemParamsOperation.getInstance().getThirdHostIpAddress());
+            SystemParamsOperation.getInstance().setSecIpAddress(SystemParamsOperation.getInstance().getThirdHostSecIpAddress());
+        } else {
+            SystemParamsOperation.getInstance().setHostName(cardPrimaryHostName);
+            SystemParamsOperation.getInstance().setTerminalId(cardPrimaryTid);
+            SystemParamsOperation.getInstance().setMerchantId(cardPrimaryMid);
+            SystemParamsOperation.getInstance().setIpAddress(cardPrimaryIp);
+            SystemParamsOperation.getInstance().setSecIpAddress(cardPrimarySecIp);
+        }
+
+        CurrencyType currencyType = useSecondaryCardHost ? toCurrencyType(selected) : cardPrimaryCurrency;
+        SystemParamsOperation.getInstance().setCurrencyType(currencyType);
+        sharedViewModel.set_currencyText(currencyType.name);
+    }
+
+    private void cachePrimaryCardHostIfNeeded() {
+        if (cardPrimaryHostCached) {
+            return;
+        }
+
+        cardPrimaryHostName = SystemParamsOperation.getInstance().getHostName();
+        cardPrimaryTid = SystemParamsOperation.getInstance().getTerminalId();
+        cardPrimaryMid = SystemParamsOperation.getInstance().getMerchantId();
+        cardPrimaryIp = SystemParamsOperation.getInstance().getIpAddress();
+        cardPrimarySecIp = SystemParamsOperation.getInstance().getSecIpAddress();
+        CurrencyType activeCurrency = SystemParamsOperation.getInstance().getCurrencyType();
+        cardPrimaryCurrency = activeCurrency == null ? CurrencyType.MMK : activeCurrency;
+        cardPrimaryHostCached = true;
+    }
+
+    private void showCurrencyPickerDialog(String title, List<String> currencies, CurrencySelectCallback callback) {
+        LinearLayout root = new LinearLayout(requireContext());
+        root.setOrientation(LinearLayout.VERTICAL);
+        root.setPadding(dp(20), dp(20), dp(20), dp(12));
+
+        TextView tvTitle = new TextView(requireContext());
+        tvTitle.setText(title);
+        tvTitle.setTextSize(TypedValue.COMPLEX_UNIT_SP, 20);
+        tvTitle.setTextColor(ContextCompat.getColor(requireContext(), R.color.colorTextTitle));
+        tvTitle.setPadding(0, 0, 0, dp(16));
+        root.addView(tvTitle);
+
+        final AlertDialog[] dialogHolder = new AlertDialog[1];
+        for (String currency : currencies) {
+            AppCompatButton button = new AppCompatButton(requireContext());
+            LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(
+                    LinearLayout.LayoutParams.MATCH_PARENT,
+                    dp(56)
+            );
+            lp.bottomMargin = dp(10);
+            button.setLayoutParams(lp);
+            button.setAllCaps(false);
+            button.setText(currency);
+            button.setTextSize(TypedValue.COMPLEX_UNIT_SP, 18);
+            button.setGravity(Gravity.CENTER);
+            button.setBackgroundResource(R.drawable.bg_rounded_btn_cv);
+            button.setTextColor(ContextCompat.getColor(requireContext(), R.color.white));
+            button.setOnClickListener(v -> {
+                if (dialogHolder[0] != null) {
+                    dialogHolder[0].dismiss();
+                }
+                callback.onSelected(currency);
+            });
+            root.addView(button);
+        }
+
+        AppCompatButton cancel = new AppCompatButton(requireContext());
+        LinearLayout.LayoutParams cancelLp = new LinearLayout.LayoutParams(
+                LinearLayout.LayoutParams.MATCH_PARENT,
+                dp(52)
+        );
+        cancel.setLayoutParams(cancelLp);
+        cancel.setAllCaps(false);
+        cancel.setText("Cancel");
+        cancel.setTextSize(TypedValue.COMPLEX_UNIT_SP, 16);
+        cancel.setBackgroundResource(R.drawable.bg_rounded_btn_cancel_cv);
+        cancel.setTextColor(ContextCompat.getColor(requireContext(), R.color.colorPrimary));
+        cancel.setOnClickListener(v -> {
+            if (dialogHolder[0] != null) {
+                dialogHolder[0].dismiss();
+            }
+        });
+        root.addView(cancel);
+
+        AlertDialog dialog = new AlertDialog.Builder(requireContext())
+                .setView(root)
+                .create();
+        dialogHolder[0] = dialog;
+        dialog.show();
+    }
+
+    private int dp(int value) {
+        return Math.round(value * requireContext().getResources().getDisplayMetrics().density);
+    }
+
+    private interface CurrencySelectCallback {
+        void onSelected(String currency);
+    }
+
+    private CurrencyType toCurrencyType(String value) {
+        String normalized = normalizeCurrency(value);
+        try {
+            return CurrencyType.valueOf(normalized);
+        } catch (Exception ignored) {
+            return CurrencyType.MMK;
+        }
+    }
+
+    private String normalizeCurrency(String raw) {
+        if (TextUtils.isEmpty(raw)) {
+            return "";
+        }
+
+        String value = raw.trim().toUpperCase();
+        switch (value) {
+            case "104":
+            case "MMK":
+                return "MMK";
+            case "840":
+            case "USD":
+                return "USD";
+            case "156":
+            case "CNY":
+            case "RMB":
+                return "CNY";
+            case "764":
+            case "THB":
+                return "THB";
+            case "643":
+            case "RUB":
+                return "RUB";
+            default:
+                return value;
+        }
+    }
+
     private void processBatch() {
 
         calculateLastTransaction();
@@ -722,18 +931,11 @@ public class MainFragment extends DataBindingFragment {
                 showSingleInfoDialog(getResourceString(R.string.txt_please_enable_internet));
             } else if (SystemParamsOperation.getInstance().isNeedSettlement()) {
                 AlertXDialog.getInstance().showDialog(requireContext(), getResourceString(R.string.title_need_settle), getResourceString(R.string.txt_do_you_want_to_continue), () -> {
-                    processBatch();
-                    sharedViewModel.transactionsType.setValue(TransactionsType.SALE);
-                    sharedViewModel.processCode.postValue(ProcessCode.SALE_PURCHASE + ProcessCode.SMART + ProcessCode.TO_ACCOUNT);
-                    navigateToAmount();
+                    showCurrencyChooserForCardSale();
                 });
 
             } else {
-                processBatch();
-                sharedViewModel.transactionsType.setValue(TransactionsType.SALE);
-                sharedViewModel.setTransMenu(TransMenu.SALE);
-                sharedViewModel.processCode.postValue(ProcessCode.SALE_PURCHASE + ProcessCode.SMART + ProcessCode.TO_ACCOUNT);
-                navigateToAmount();
+                showCurrencyChooserForCardSale();
             }
         }
 
diff --git a/app/src/main/java/com/utsmm/kbz/ui/dashboard/DashboardTransFragment.java b/app/src/main/java/com/utsmm/kbz/ui/dashboard/DashboardTransFragment.java
index 62e3e3f..89b1983 100644
--- a/app/src/main/java/com/utsmm/kbz/ui/dashboard/DashboardTransFragment.java
+++ b/app/src/main/java/com/utsmm/kbz/ui/dashboard/DashboardTransFragment.java
@@ -2,16 +2,25 @@ package com.utsmm.kbz.ui.dashboard;
 
 
 import android.os.Bundle;
+import android.text.TextUtils;
+import android.util.TypedValue;
 import android.view.View;
+import android.view.Gravity;
+import android.widget.LinearLayout;
+import android.widget.TextView;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
+import androidx.appcompat.app.AlertDialog;
+import androidx.appcompat.widget.AppCompatButton;
+import androidx.core.content.ContextCompat;
 
 import com.utsmm.kbz.util.enums.SettlementType;
 import com.utsmyanmar.baselib.fragment.DataBindingFragment;
 import com.utsmyanmar.baselib.util.DataBindingConfig;
 import com.utsmyanmar.paylibs.utils.LogUtil;
 import com.utsmyanmar.paylibs.utils.core_utils.SystemParamsOperation;
+import com.utsmyanmar.paylibs.utils.enums.CurrencyType;
 import com.utsmyanmar.paylibs.utils.enums.TransMenu;
 import com.utsmyanmar.paylibs.utils.iso_utils.TransactionsType;
 import com.utsmm.kbz.BR;
@@ -24,6 +33,8 @@ import com.utsmm.kbz.ui.core_viewmodel.SharedViewModel;
 import com.utsmm.kbz.util.tms.TMSUtil;
 
 import java.util.ArrayList;
+import java.util.LinkedHashSet;
+import java.util.List;
 
 public class DashboardTransFragment extends DataBindingFragment {
 
@@ -34,6 +45,13 @@ public class DashboardTransFragment extends DataBindingFragment {
     private ArrayList<Features> featuresList = new ArrayList<>();
 
     MainAdapter mainAdapter;
+    private boolean cardPrimaryHostCached = false;
+    private String cardPrimaryHostName = "";
+    private String cardPrimaryTid = "";
+    private String cardPrimaryMid = "";
+    private String cardPrimaryIp = "";
+    private String cardPrimarySecIp = "";
+    private CurrencyType cardPrimaryCurrency = CurrencyType.MMK;
 
     private static final int hostId = Constants.NAV_HOST_ID;
     private int routeId;
@@ -220,9 +238,11 @@ public class DashboardTransFragment extends DataBindingFragment {
             } else if (checkTid()) {
                 showDeclineDialog("Please Download Config!");
             } else {
-                sharedViewModel.setTransactionsType(TransactionsType.PRE_AUTH_SALE);
-                routeId = R.id.action_dashboardTransFragment_to_inputAmountFragment;
-                safeRouteTo(currentId,routeId,hostId);
+                showCurrencyChooserForCardFlow(() -> {
+                    sharedViewModel.setTransactionsType(TransactionsType.PRE_AUTH_SALE);
+                    routeId = R.id.action_dashboardTransFragment_to_inputAmountFragment;
+                    safeRouteTo(currentId, routeId, hostId);
+                });
             }
 
         }
@@ -253,10 +273,12 @@ public class DashboardTransFragment extends DataBindingFragment {
 
 
         public void onClickCashAdvance() {
-            sharedViewModel.setTransactionsType(TransactionsType.CASH_OUT);
-            sharedViewModel.setTransMenu(TransMenu.CASH_OUT);
-            routeId = R.id.action_dashboardTransFragment_to_inputAmountFragment;
-            safeRouteTo(currentId,routeId,hostId);
+            showCurrencyChooserForCardFlow(() -> {
+                sharedViewModel.setTransactionsType(TransactionsType.CASH_OUT);
+                sharedViewModel.setTransMenu(TransMenu.CASH_OUT);
+                routeId = R.id.action_dashboardTransFragment_to_inputAmountFragment;
+                safeRouteTo(currentId, routeId, hostId);
+            });
 
         }
         public void onClickDeviceConfig(){
@@ -265,4 +287,190 @@ public class DashboardTransFragment extends DataBindingFragment {
         }
     }
 
+    private void showCurrencyChooserForCardFlow(Runnable onSelected) {
+        List<String> currencies = getAvailableCardSaleCurrencies();
+        if (currencies.isEmpty()) {
+            applyCardCurrencyAndHost("MMK");
+            onSelected.run();
+            return;
+        }
+
+        if (currencies.size() == 1) {
+            applyCardCurrencyAndHost(currencies.get(0));
+            onSelected.run();
+            return;
+        }
+
+        showCurrencyPickerDialog("Choose Currency", currencies, currency -> {
+            applyCardCurrencyAndHost(currency);
+            onSelected.run();
+        });
+    }
+
+    private List<String> getAvailableCardSaleCurrencies() {
+        cachePrimaryCardHostIfNeeded();
+        LinkedHashSet<String> values = new LinkedHashSet<>();
+
+        if (cardPrimaryCurrency != null && !TextUtils.isEmpty(cardPrimaryCurrency.name)) {
+            values.add(normalizeCurrency(cardPrimaryCurrency.name));
+        }
+
+        String secondaryCurrency = normalizeCurrency(SystemParamsOperation.getInstance().getThirdHostCurrency());
+        if (!TextUtils.isEmpty(SystemParamsOperation.getInstance().getThirdHostName()) && !TextUtils.isEmpty(secondaryCurrency)) {
+            values.add(secondaryCurrency);
+        }
+
+        return new ArrayList<>(values);
+    }
+
+    private void applyCardCurrencyAndHost(String selectedCurrency) {
+        cachePrimaryCardHostIfNeeded();
+
+        String selected = normalizeCurrency(selectedCurrency);
+        String secondaryCurrency = normalizeCurrency(SystemParamsOperation.getInstance().getThirdHostCurrency());
+
+        boolean useSecondaryCardHost = !TextUtils.isEmpty(SystemParamsOperation.getInstance().getThirdHostName())
+                && !TextUtils.isEmpty(secondaryCurrency)
+                && secondaryCurrency.equals(selected);
+
+        if (useSecondaryCardHost) {
+            SystemParamsOperation.getInstance().setHostName(SystemParamsOperation.getInstance().getThirdHostName());
+            SystemParamsOperation.getInstance().setTerminalId(SystemParamsOperation.getInstance().getThirdHostTerminalId());
+            SystemParamsOperation.getInstance().setMerchantId(SystemParamsOperation.getInstance().getThirdHostMerchantId());
+            SystemParamsOperation.getInstance().setIpAddress(SystemParamsOperation.getInstance().getThirdHostIpAddress());
+            SystemParamsOperation.getInstance().setSecIpAddress(SystemParamsOperation.getInstance().getThirdHostSecIpAddress());
+        } else {
+            SystemParamsOperation.getInstance().setHostName(cardPrimaryHostName);
+            SystemParamsOperation.getInstance().setTerminalId(cardPrimaryTid);
+            SystemParamsOperation.getInstance().setMerchantId(cardPrimaryMid);
+            SystemParamsOperation.getInstance().setIpAddress(cardPrimaryIp);
+            SystemParamsOperation.getInstance().setSecIpAddress(cardPrimarySecIp);
+        }
+
+        CurrencyType currencyType = useSecondaryCardHost ? toCurrencyType(selected) : cardPrimaryCurrency;
+        SystemParamsOperation.getInstance().setCurrencyType(currencyType);
+        sharedViewModel.set_currencyText(currencyType.name);
+    }
+
+    private void cachePrimaryCardHostIfNeeded() {
+        if (cardPrimaryHostCached) {
+            return;
+        }
+
+        cardPrimaryHostName = SystemParamsOperation.getInstance().getHostName();
+        cardPrimaryTid = SystemParamsOperation.getInstance().getTerminalId();
+        cardPrimaryMid = SystemParamsOperation.getInstance().getMerchantId();
+        cardPrimaryIp = SystemParamsOperation.getInstance().getIpAddress();
+        cardPrimarySecIp = SystemParamsOperation.getInstance().getSecIpAddress();
+        CurrencyType activeCurrency = SystemParamsOperation.getInstance().getCurrencyType();
+        cardPrimaryCurrency = activeCurrency == null ? CurrencyType.MMK : activeCurrency;
+        cardPrimaryHostCached = true;
+    }
+
+    private CurrencyType toCurrencyType(String value) {
+        String normalized = normalizeCurrency(value);
+        try {
+            return CurrencyType.valueOf(normalized);
+        } catch (Exception ignored) {
+            return CurrencyType.MMK;
+        }
+    }
+
+    private String normalizeCurrency(String raw) {
+        if (TextUtils.isEmpty(raw)) {
+            return "";
+        }
+
+        String value = raw.trim().toUpperCase();
+        switch (value) {
+            case "104":
+            case "MMK":
+                return "MMK";
+            case "840":
+            case "USD":
+                return "USD";
+            case "156":
+            case "CNY":
+            case "RMB":
+                return "CNY";
+            case "764":
+            case "THB":
+                return "THB";
+            case "643":
+            case "RUB":
+                return "RUB";
+            default:
+                return value;
+        }
+    }
+
+    private void showCurrencyPickerDialog(String title, List<String> currencies, CurrencySelectCallback callback) {
+        LinearLayout root = new LinearLayout(requireContext());
+        root.setOrientation(LinearLayout.VERTICAL);
+        root.setPadding(dp(20), dp(20), dp(20), dp(12));
+
+        TextView tvTitle = new TextView(requireContext());
+        tvTitle.setText(title);
+        tvTitle.setTextSize(TypedValue.COMPLEX_UNIT_SP, 20);
+        tvTitle.setTextColor(ContextCompat.getColor(requireContext(), R.color.colorTextTitle));
+        tvTitle.setPadding(0, 0, 0, dp(16));
+        root.addView(tvTitle);
+
+        final AlertDialog[] dialogHolder = new AlertDialog[1];
+        for (String currency : currencies) {
+            AppCompatButton button = new AppCompatButton(requireContext());
+            LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(
+                    LinearLayout.LayoutParams.MATCH_PARENT,
+                    dp(56)
+            );
+            lp.bottomMargin = dp(10);
+            button.setLayoutParams(lp);
+            button.setAllCaps(false);
+            button.setText(currency);
+            button.setTextSize(TypedValue.COMPLEX_UNIT_SP, 18);
+            button.setGravity(Gravity.CENTER);
+            button.setBackgroundResource(R.drawable.bg_rounded_btn_cv);
+            button.setTextColor(ContextCompat.getColor(requireContext(), R.color.white));
+            button.setOnClickListener(v -> {
+                if (dialogHolder[0] != null) {
+                    dialogHolder[0].dismiss();
+                }
+                callback.onSelected(currency);
+            });
+            root.addView(button);
+        }
+
+        AppCompatButton cancel = new AppCompatButton(requireContext());
+        LinearLayout.LayoutParams cancelLp = new LinearLayout.LayoutParams(
+                LinearLayout.LayoutParams.MATCH_PARENT,
+                dp(52)
+        );
+        cancel.setLayoutParams(cancelLp);
+        cancel.setAllCaps(false);
+        cancel.setText("Cancel");
+        cancel.setTextSize(TypedValue.COMPLEX_UNIT_SP, 16);
+        cancel.setBackgroundResource(R.drawable.bg_rounded_btn_cancel_cv);
+        cancel.setTextColor(ContextCompat.getColor(requireContext(), R.color.colorPrimary));
+        cancel.setOnClickListener(v -> {
+            if (dialogHolder[0] != null) {
+                dialogHolder[0].dismiss();
+            }
+        });
+        root.addView(cancel);
+
+        AlertDialog dialog = new AlertDialog.Builder(requireContext())
+                .setView(root)
+                .create();
+        dialogHolder[0] = dialog;
+        dialog.show();
+    }
+
+    private int dp(int value) {
+        return Math.round(value * requireContext().getResources().getDisplayMetrics().density);
+    }
+
+    private interface CurrencySelectCallback {
+        void onSelected(String currency);
+    }
+
 }