said by kwayzcat :

1gig a month is a ridiculously low limit. I am a huge TMO fan, been a loyal customer for 7 years. But 1 gig per month is absurd. I am already thinking about jumping ship to another carrier.

Data: If your total data usage in any billing cycle is more than 1GB, your data throughput for the remainder of that cycle may be reduced to 50 kbps or less. Your data session, plan, or service may be suspended, terminated, or restricted for significant roaming or if you use your service in a way that interferes with our network or ability to provide quality service to other users.

said by DaSneaky1D :

Considering all of the features this thing has (push Gmail, Maps integration...including compass mode!, and all of the sync) that is to low to even imagine as being worth it. T-mo really needs to rethink this limit. At least raise it to the standard 5GB.