I noticed on the Blackberry website that their car charger for the 7105t (7100 category) is also compatible with the 8700 and some others. So I took a chance and ordered this one (which is only labeled for the 8700) hoping it would work with my 7105t. It did. I paid a total of $11.34 for this one. That included shipping. It cost $25 on the Blackberry website. It does have a T-mobile label on it.Side note: I purchased this because my previous charger would not charge the phone when I plugged it in my car. The charge light would come on for about 2 seconds then stop charging. Purchasing this item solved that problem.