Thread: Unknown Subscriber error on my Samsung Phone?!?

Whenever I send or try to receive picture messages I get an UNknown Subscriber message. I cannot see or receive the message. I have a Samsung T509 phone with and AT&T chip in it. Please help it is really annoying I don't know what to do!

Since its an unlocked phone, you may not have access to the at&t data network. Can you get on the internet with the phone? If not, you can try calling customer service to get the correct settings, but not everyone that answers will want to tell you since its not an actual "at&t phone." Phones that are locked to at&t come preloaded with the settings needed to access everything on the network which is why you rarely hear about this.

If it only happens when you try to send picture messages, I would think that this is you problem since you need internet access to send them...

Try changing ur send or recieve settings.