If MetroPCS has moved into your area, you can get a MetroPCS 521 for $99. MetroPCS is slowly moving into all the current T-Mobile markets with GSM phones. If the phone is locked like the T-Mobile phones, then it should work on T-Mobile. As for MetroPCS, they do not have the $30 plan, their other plans appear identical to the T-Mobile $50/60/70 plans but cost $10 less a month (so $40/50/60).