Hi. I used the samsung switch app to move from my S9plus to a S20 ultra. Now I'm experiencing text messaging issues- messages appear to arrive from a different contact than the one that sent them, and when I send a message to one contact, they go to another instead.
Are you using the stock messaging app?
- If not I would recommend trying the stock messaging app
Have you tried force stopping and clearing the cache and data for the messaging app?
-If not go to settings > apps > messages > tap on force stop > then tap on storage and clear the cache and data
Have you tried wiping the cache partition on your device?
- Give these steps a try:
If you go to your contacts do the names and numbers appear to be switched?
If your phone is misbehaving, it's possible that a third-party app is causing the issue. To figure out what app is acting funny, you can use the Safe Mode feature. In Safe Mode, your phone won't run any third-party apps. This allows you to easily identify and remove the app that may be causing the problem.
Give this link a try to test your device in safe mode: https://www.samsung.com/us/support/answer/ANS00062983/
If the troubleshooting provided above doesn't resolve the symptoms you are experiencing, I would recommend factory resetting your device and trying to transfer the information via Smart Switch again. Important: Please save any information you need prior to the factory reset because otherwise your personal information may not be recovered. If you have encrypted the microSD card, you must decrypt it before resetting the phone. Otherwise, your phone will not be able to read the data on the card. From Settings, search for and select Decrypt SD card, and then follow the on-screen prompts.
Give this link a try for step to factory reset your device: https://www.samsung.com/us/support/answer/ANS00062029/