diff --git a/src/components/transaction-sum/transaction-sum.tsx b/src/components/transaction-sum/transaction-sum.tsx
index ec0e19d5e..51f428cfa 100644
--- a/src/components/transaction-sum/transaction-sum.tsx
+++ b/src/components/transaction-sum/transaction-sum.tsx
@@ -35,7 +35,7 @@ export type TransactionSumProps = {
   to: string;
   from: string;
   contact: Contact | null;
-  onAmount: (amount: Balance) => void;
+  onPressPreview: (amount: Balance) => void;
   onContact: () => void;
   onToken: () => void;
   onNetworkPress: () => void;
@@ -52,7 +52,7 @@ export const TransactionSum = observer(
     balance,
     fee,
     contact,
-    onAmount,
+    onPressPreview,
     onContact,
     onToken,
     onNetworkPress,
@@ -105,14 +105,8 @@ export const TransactionSum = observer(
     );
 
     const onDone = useCallback(() => {
-      onAmount(
-        new Balance(
-          parseFloat(amounts.amount),
-          undefined,
-          token.symbol ?? undefined,
-        ),
-      );
-    }, [amounts, onAmount]);
+      onPressPreview(amounts.amountBalance);
+    }, [amounts, onPressPreview]);
 
     const onPressMax = useCallback(() => {
       vibrate(HapticEffects.impactLight);
diff --git a/src/components/ui/sum-block.tsx b/src/components/ui/sum-block.tsx
index 568026fd3..424f2cb35 100644
--- a/src/components/ui/sum-block.tsx
+++ b/src/components/ui/sum-block.tsx
@@ -88,7 +88,9 @@ export const SumBlock = observer(
         });
       }
 
-      return new Balance(Number(value)).toFiat();
+      return new Balance(Number(value)).toFiat({
+        fixed: 'auto',
+      });
     }, [token?.decimals, token?.symbol, value]);
 
     return (
diff --git a/src/hooks/use-sum-amount.ts b/src/hooks/use-sum-amount.ts
index 736deb524..d41382a47 100644
--- a/src/hooks/use-sum-amount.ts
+++ b/src/hooks/use-sum-amount.ts
@@ -40,10 +40,10 @@ export const useSumAmount = (
           numericality: {
             notValid: 'Invalid number',
             greaterThanOrEqualTo: minAmountRef.current.toFloat(),
-            lessThanOrEqualTo: maxAmountRef.current.toFloat(),
-            notGreaterThan: getText(I18N.sumAmountTooLow, {
-              amount: maxAmountRef.current.toBalanceString('auto'),
+            notGreaterThanOrEqualTo: getText(I18N.sumAmountTooLow, {
+              amount: minAmountRef.current.toBalanceString('auto'),
             }),
+            lessThanOrEqualTo: maxAmountRef.current.toFloat(),
             notLessThanOrEqualTo: getText(I18N.sumAmountNotEnough, {
               symbol: maxAmountRef.current.getSymbol(),
             }),
@@ -73,6 +73,7 @@ export const useSumAmount = (
       !error,
     maxAmount: maxAmount,
     amount: amountText,
+    amountBalance: amount,
     error,
     setMaxAmount(value = Balance.Empty) {
       maxAmountRef.current = value;
@@ -104,7 +105,7 @@ export const useSumAmount = (
         changed: _changed,
       }));
     },
-    setAmount(text: string, precision = app.provider.decimals) {
+    setAmount(text: string, precision?: number) {
       if (text.match(/^[0-9].*/)) {
         let i = 0;
         const textFormatted = text
@@ -118,7 +119,18 @@ export const useSumAmount = (
           .replace(/\D&[^.]/g, '')
           .replace(/^0[0-9]/gm, '0');
 
-        const newAmount = new Balance(+textFormatted, precision);
+        const decimals =
+          precision ??
+          maxAmountRef.current?.getPrecission?.() ??
+          minAmountRef.current?.getPrecission?.() ??
+          app.provider.decimals;
+
+        const denom =
+          maxAmountRef.current?.getSymbol?.() ??
+          minAmountRef.current?.getSymbol?.() ??
+          app.provider.denom;
+
+        const newAmount = new Balance(+textFormatted, decimals, denom);
         if (typeof onChange === 'function') {
           onChange(newAmount, textFormatted);
         }
diff --git a/src/screens/HomeStack/TransactionStack/transaction-sum.tsx b/src/screens/HomeStack/TransactionStack/transaction-sum.tsx
index 172ca5bd3..e74e80c84 100644
--- a/src/screens/HomeStack/TransactionStack/transaction-sum.tsx
+++ b/src/screens/HomeStack/TransactionStack/transaction-sum.tsx
@@ -69,7 +69,7 @@ export const TransactionSumScreen = memo(() => {
           });
         }
       } catch (err) {
-        Logger.log('err onAmount', err);
+        Logger.log('tx sum err getFee', err);
         return null;
       }
     },
@@ -87,8 +87,8 @@ export const TransactionSumScreen = memo(() => {
     };
   }, [event, onAddress]);
 
-  const onAmount = useCallback(
-    async (amount: Balance) => {
+  const onPressPreview = useCallback(
+    async (amount: Balance, repeated = false) => {
       setLoading(true);
       const estimate = await getFee(amount);
 
@@ -104,9 +104,13 @@ export const TransactionSumScreen = memo(() => {
         showModal(ModalType.error, {
           title: getText(I18N.feeCalculatingRpcErrorTitle),
           description: getText(I18N.feeCalculatingRpcErrorDescription),
-          close: getText(I18N.feeCalculatingRpcErrorClose),
+          close: getText(
+            repeated ? I18N.cancel : I18N.feeCalculatingRpcErrorClose,
+          ),
           onClose: () => {
-            onAmount(amount);
+            if (!repeated) {
+              onPressPreview(amount, true);
+            }
           },
         });
       }
@@ -156,7 +160,7 @@ export const TransactionSumScreen = memo(() => {
       fee={fee}
       to={to}
       from={route.params.from}
-      onAmount={onAmount}
+      onPressPreview={onPressPreview}
       onContact={onContact}
       onToken={onToken}
       onNetworkPress={onNetworkPress}