Welcome to the Community
Was your previous signature set up in the settings of your phone or using another type of service?
Is it still showing when you send messages from your new phone?
Yes I used my phone the first time I set the texting about 6 years ago.
The signature still the same even with the new phone and new sim card. But I can not change. My new phone is LG g5 and I do not have the option to modified my signature in the settings of my texting aplication.