diff --git a/packages/twenty-front/src/modules/object-record/record-field/meta-types/input/components/MultiItemBaseInput.tsx b/packages/twenty-front/src/modules/object-record/record-field/meta-types/input/components/MultiItemBaseInput.tsx
index 88cec276ebe1..9df21b0e2ab1 100644
--- a/packages/twenty-front/src/modules/object-record/record-field/meta-types/input/components/MultiItemBaseInput.tsx
+++ b/packages/twenty-front/src/modules/object-record/record-field/meta-types/input/components/MultiItemBaseInput.tsx
@@ -78,6 +78,7 @@ export type MultiItemBaseInputProps = Omit<HTMLInputProps, 'onChange'> & {
     onChange: (value: string) => void;
     autoFocus: HTMLInputProps['autoFocus'];
     placeholder: HTMLInputProps['placeholder'];
+    hasError?: boolean;
   }) => React.ReactNode;
   error?: string | null;
   hasError?: boolean;
@@ -134,6 +135,7 @@ export const MultiItemBaseInput = forwardRef<
               onChange,
               autoFocus,
               placeholder,
+              hasError,
             })
           ) : (
             <StyledInput
diff --git a/packages/twenty-front/src/modules/object-record/record-field/meta-types/input/components/PhonesFieldInput.tsx b/packages/twenty-front/src/modules/object-record/record-field/meta-types/input/components/PhonesFieldInput.tsx
index 466058deffd8..457bb48cdde9 100644
--- a/packages/twenty-front/src/modules/object-record/record-field/meta-types/input/components/PhonesFieldInput.tsx
+++ b/packages/twenty-front/src/modules/object-record/record-field/meta-types/input/components/PhonesFieldInput.tsx
@@ -1,5 +1,8 @@
 import { usePhonesField } from '@/object-record/record-field/meta-types/hooks/usePhonesField';
 import { PhonesFieldMenuItem } from '@/object-record/record-field/meta-types/input/components/PhonesFieldMenuItem';
+import { recordFieldInputIsFieldInErrorComponentState } from '@/object-record/record-field/states/recordFieldInputIsFieldInErrorComponentState';
+import { phoneSchema } from '@/object-record/record-field/validation-schemas/phoneSchema';
+import { useSetRecoilComponentStateV2 } from '@/ui/utilities/state/component-state/hooks/useSetRecoilComponentStateV2';
 import styled from '@emotion/styled';
 import { E164Number, parsePhoneNumber } from 'libphonenumber-js';
 import ReactPhoneNumberInput from 'react-phone-number-input';
@@ -19,6 +22,7 @@ export const DEFAULT_PHONE_CALLING_CODE = '1';
 
 const StyledCustomPhoneInputContainer = styled.div<{
   hasItem: boolean;
+  hasError?: boolean;
 }>`
   ${({ hasItem, theme }) =>
     hasItem &&
@@ -28,6 +32,13 @@ const StyledCustomPhoneInputContainer = styled.div<{
       border: 1px solid ${theme.border.color.medium};
       height: 30px;
     `}
+
+  ${({ hasError, hasItem, theme }) =>
+    hasError &&
+    hasItem &&
+    css`
+      border: 1px solid ${theme.border.color.danger};
+    `}
 `;
 
 const StyledCustomPhoneInput = styled(ReactPhoneNumberInput)`
@@ -93,10 +104,23 @@ export const PhonesFieldInput = ({
     });
   };
 
+  const validateInput = (input: string) => ({
+    isValid: phoneSchema.safeParse(input).success,
+    errorMessage: '',
+  });
+
   const getShowPrimaryIcon = (index: number) =>
     index === 0 && phones.length > 1;
   const getShowSetAsPrimaryButton = (index: number) => index > 0;
 
+  const setIsFieldInError = useSetRecoilComponentStateV2(
+    recordFieldInputIsFieldInErrorComponentState,
+  );
+
+  const handleError = (hasError: boolean, values: any[]) => {
+    setIsFieldInError(hasError && values.length === 0);
+  };
+
   return (
     <MultiItemFieldInput
       items={phones}
@@ -105,6 +129,7 @@ export const PhonesFieldInput = ({
       onCancel={onCancel}
       placeholder="Phone"
       fieldMetadataType={FieldMetadataType.PHONES}
+      validateInput={validateInput}
       formatInput={(input) => {
         const phone = parsePhoneNumber(input);
         if (phone !== undefined) {
@@ -138,9 +163,12 @@ export const PhonesFieldInput = ({
           onDelete={handleDelete}
         />
       )}
-      renderInput={({ value, onChange, autoFocus, placeholder }) => {
+      renderInput={({ value, onChange, autoFocus, placeholder, hasError }) => {
         return (
-          <StyledCustomPhoneInputContainer hasItem={!!phones.length}>
+          <StyledCustomPhoneInputContainer
+            hasItem={!!phones.length}
+            hasError={hasError}
+          >
             <StyledCustomPhoneInput
               autoFocus={autoFocus}
               placeholder={placeholder}
@@ -154,6 +182,7 @@ export const PhonesFieldInput = ({
           </StyledCustomPhoneInputContainer>
         );
       }}
+      onError={handleError}
     />
   );
 };
diff --git a/packages/twenty-front/src/modules/object-record/record-field/validation-schemas/phoneSchema.ts b/packages/twenty-front/src/modules/object-record/record-field/validation-schemas/phoneSchema.ts
new file mode 100644
index 000000000000..a94f4343d78b
--- /dev/null
+++ b/packages/twenty-front/src/modules/object-record/record-field/validation-schemas/phoneSchema.ts
@@ -0,0 +1,12 @@
+import { parsePhoneNumberWithError } from 'libphonenumber-js';
+import { z } from 'zod';
+
+export const phoneSchema = z.string().refine((value) => {
+  if (!value || value.trim() === '') return false;
+  try {
+    const phone = parsePhoneNumberWithError(value);
+    return phone.isValid();
+  } catch {
+    return false;
+  }
+});