Is there a problem with texting from an Iphone 4s to Sprint users?
Is there a fix?
That would certainly depend on the reason for the problem. Are you using iMessage? If so, is the bubble around the message blue or green? If it is blue, does the recipient have an iPhone? If yes, are you sure they have an iPhone. If no, did the recipient recently change from an iPhone to another type of phone?(android, windows, etc...)