MESSAGE NOT SENT. PHONE NUMBER FORMATTED INCORRECTLY!!!

[gers_mintas]

ZF Model: ZE554KL
RAM: 3G
Firmware/APP Version: the latest version
Frequency of Occurrence: a lot Everytime I try sending messages
Rooted: No
APP Name: messagea

Hi, what's wrong with this Android phone, I keep trying sending messages but then a note will appear " MESSAGE NOT SENT.PHONE NUMBER FORMATTED INCORRECTLY". I already tried the 3 ways suggestion like clear data of the app, shut down or reboot and update the system BUT still that note appears.

[ServiceH_ASUS]

Hi gers_mintas Which firmware version and android messages version are you currently on? Try to go to Settings>Apps>Messages>Disable>Remove updates Does this problem only happen to this contact? or you cannot send message to anyone? If only happen to this contact, you may try to delete this contact and add it again. Thank you:)