Can’t send text message error code 38, however i can send text to number if i delete contact

[Dave76]

Hi All

Apologies if this has been asked before.

Last year i stopped being able to send text messages to one number. I get an error code 38.

After searching for the solution i have discovered if i delete the text thread and the contact, i am able to text the number again. But as soon as they reply to my text, I am unable to send them text messages again.

I then have to delete the text thread and contact following the same process…..which works until they reply again, where i cant message the contact yet again.

this is very frustrating and it is only one contact.

i have checked my blocked numbers and theirs and they are not blocked. I also spoke to staff in an O2 shop who were unable to help me.

i am using a google pixel 7a currently but this started with my previous phone which was a pixel 4a, and changing mobile phones did not solve the problem.

any advice greatly appreciated

many thanks

[MI5]

@Dave76 

Try a different text app to see if it continues or not.