There are differences in what is offered with the plans. Postpaid plans allow for data roaming while prepaid plans do not. Postpaid Simple Choice plans allow customers to use EIP and also enroll in the JUMP program while prepaid plans do not. Postpaid plans offer detailed billing while prepaid plans do not. Taxes and fees are higher on postpaid plans than prepaid plans in most cases.
There are other differences that I am less familiar with (such as conditional call forwarding) and differences that won't apply with the plans that you listed in your post (Wi-Fi calling that doesn't use the plan minutes-you listed unlimited minutes plans, so it won't matter).
I admit that I haven't done very deep digging on the T-Mobile Web site, but where can I find the actual terms of each of the plans?
You note that taxes and fees are higher on the postpaid plans, so I'd expect there be something to make them worth the added expense, even though the descriptions on the Web site make them appear to be identical.
The $50 prepaid plan is identical to the $50 Simple Choice plan except
Simple Choice has additional features:
- Data roaming
- This new international roaming thing
- Conditional Call Forwarding ("custom voicemail")
- EIP (ability to finance a new phone at 0% interest)
- Detailed billing (most companies won't reimburse without a bill.
Receipts don't generally work, and TM doesn't provide receipts - would
have to buy a card in a store to get that)
- More roaming coverage (apparently prepaid doesn't get full advantage
of roaming in all areas?)
- And a few other things which are escaping me
To most people, these may or may not be desired (using Google Voice as
voicemail is the biggest complaint that prepaid people want.. that and
detailed billing for expensing)
Since the $30 plan is prepaid as well, you wouldn't get those features as