I am having a problem with SMS messages on my Samsung Galaxy S9+. A few months ago I started using AdvanceSMS for texting. For many years I had my cell phone number blocked, so for some contacts I had to store their phone numbers two ways - one way with *82 so they could tell it was me calling and the other w/o *82 for sending texts.
Somehow, the phone number listed on my son's text string changed and it now displays *82. When I try to reply to the text the message fails to send because of the *82. I checked my contact and he did not have *82 as an option. I tried texting him by manually typing his 10 digit number and my message was successfully delivered. When he replied it went to the *82 thread.
I do not want to loose all of my texts with my son, so deleting the thread is not an option. How can I fix this so I can simply reply to my son's texts?