Some contacts not receiving my sms messages
Since May some of my contacts are no longer receiving my sms messages UNLESS I attach an image, which sends as mms. Not 100% sure, but the affected contacts all appear to be on other networks (Verizon, etc)
I receive all sms messages, it's just the ones I am sending that are not received. If contacts are on AT&T & have chat function enable, they receive, but these msgs are not going via sms.
I've gone through troubleshooting resets, etc w/ AT&T customer service twice, and even replaced the SIM card with a newer one. Any ideas on how to fix this? Super frustrating because I have no idea who is receiving msgs & who is not.