diff --git a/apps/users/models.py b/apps/users/models.py
index aa47c36..76b65f1 100644
--- a/apps/users/models.py
+++ b/apps/users/models.py
@@ -9,13 +9,14 @@ from django.contrib.auth.validators import UnicodeUsernameValidator
 from django.db import models
 from django.utils import timezone
 from django.utils.translation import gettext_lazy as _
-from rest_framework.exceptions import APIException
 import uuid
 
 from .provinces_and_cities import state
 from .tasks import send_notification
 
 from apps.users.constans import MAX_OTP_TRY, DEVELOPMENT_PHONE_NUMBERS
+from .validators import PhoneNumberValidator
+
 
 class UserManager(BaseUserManager):
     use_in_migrations = True
@@ -106,7 +107,8 @@ class User(AbstractUser):
         blank=True,
         null=True
     )
-    phone_number = models.CharField(_('phone number'), max_length=30, blank=True, null=True, unique=True)
+    phone_number = models.CharField(_('phone number'), max_length=30, blank=True, null=True, unique=True,
+                                    validators=[PhoneNumberValidator],)
     otp = models.CharField(_('otp'), max_length=6, blank=True, null=True)
     otp_expire = models.DateTimeField(_('otp expire'), blank=True, null=True)
     otp_try = models.IntegerField(_('otp try'), blank=True, null=True, default=0)
diff --git a/apps/users/validators.py b/apps/users/validators.py
new file mode 100644
index 0000000..5638afe
--- /dev/null
+++ b/apps/users/validators.py
@@ -0,0 +1,12 @@
+from django.core import validators
+from django.utils.deconstruct import deconstructible
+from django.utils.translation import gettext_lazy as _
+
+
+@deconstructible
+class PhoneNumberValidator(validators.RegexValidator):
+    regex = r'^\+98\d{10,10}$'
+    message = _(
+        "Phone number must be entered in the format: '+989999999999'."
+    )
+    flags = 0