Quote:
Originally Posted by penguin3107 
You SIM card had a data plan (or T-Mo Feature Enabler) provisioned on it. It's clear that your sister's SIM card does not have this.
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This. The bolded part. MMS on Tmo does not require data, but requires the feature enabler (thats how it does mms without a service book or data)
The feature enabler is
PER LINE,
not per device.
Contact tmo, ask for the mms for blackberries enabler to
HER line.
You are explaining yourself just fine, you just aren't listening to the answer
