Is anyone else have issues with SMS on AT&T after the Tango update? I've noticed with several people I txt that they have not been recieving the messages I send. This may not be a Lumia 900 issue since a friend with the Radar seems to be having a very similar issue but I can't get all of the needed details to help them. I had a brief txt conversation with a friend on VZW last night (they have an HTC Thunderbolt) and needed to send more info later. I sent the info and never heard back but didn't think twice about it. Today they asked me if I ever found the info they asked for and I said yes, I sent it last night. We compared phones and mine showed the history and her phone never showed that she recieved them. I checked my AT&T records and AT&T says they never recieved them either so it makes sense that she never got them but it doesn't make sense as to why my phone says i sent them but they never really left the phone.