Recently I bought an unlocked Samsung gt-s5620 (monte) offline, to replace my old flip phone. My plan with AT&T has MMS included in the cost and the phone doesn't require a data plan; However, I cannot send or receive MMS on my new phone. I already talked to AT&T customer support and they wont help me troubleshoot my phone cause it's not "AT&T brand," such bullshit. So, I was wondering if anyone knew (or had) the MMS settings for the S5620, for AT&T. Please help me out!