Samsung s4 can only send 20 SMS reminders.

By description, please try the following:

1, shut down and restart.

2. Settings-Application Manager-All Information-Clear Data.

3. Back up mobile phone data (phone book, text messages, pictures, etc. ) and restore the phone to the factory setting (reset).

If the problem still exists, it is recommended that you take the three-guarantee certificate of your mobile phone to the nearest Samsung service center for testing.

For specific questions about the service center, please visit:

. Samsung . com/support/service locations . ASP

Samsung knows to provide you with high-quality solutions and answer your questions attentively, hoping to get your satisfactory evaluation.