I recently had to erase my iPhone and restore it from back up. Ever since then a lot of people that I used to be able to send text messages to no longer receiving them and I am getting a message of "Not Delivered". How do I fix this problem?

yonderssi wrote:

I recently had to erase my iPhone and restore it from back up. Ever since then a lot of people that I used to be able to send text messages to are no longer receiving my messages and I am getting a return message of "Not Delivered". I have done google searches to solve this problem but all suggestions say that it is a "receiver" problem not a "sender" problem. But, it is a sender problem since all these problems started after restoring my iPhone from backup. Does anyone know how to fix this problem?

SMS is a phone carrier feature, contact yours to resolve the issue.

Are you talking about SMS messages (Short Message Service), or Apple's iMessage - they both function similarly, but SMS messages appear in green, whereas iMessages appear in blue.

SMS uses your carrier's service to send to any SMS-capable user worldwide. iMessage only works between iPhone (or, more specifically, AppleID) users.

If SMS isn't working (previous messages were green), check with your service provider.

If iMessage isn't working (previous messages were blue), then you need to reset this phone's iCloud connection. Check Settings -> iCloud... it may be best to turn it off first, then turn it back on to reset the connection.

yonderssi wrote:

Thank you for the message. What does SMS mean? My iPhone is through Verizon. Is Verizon my SMS? Are you saying I should contact Verizon? If not, how do I find out who my SMS is?

SMS is text message which is a Verizon feature, contact them.