square boxes with x in them?

[AC Question]

I have this friend and just resently when I text him (from go sms pro) he doesn't get the message. All he can see is boxes with x in them. I thought it might have been that he accidently blocked me but when i looked at his phone everything was fine. I even tried texting him when i was with him to see what happens and all he gets is a message with boxes and x in them. I have a samsung note 5 and he has a walmart phone. Does anyone know whg this is happening?

By the way this happens even if the message is shory or long.

 

[Rukbat]

"A Walmart phone" doesn't tell us anything - but a box with an X in it means "a picture goes here, but I never got the picture, so I have no idea what it should be". This might be related to people receiving Chinese texts when they were sent in English.

 

[Jessica Milligan1]

I didn't send a picture. I wrote a text and sent it to him but instead of the text boxes with x in them showed up