You really have to see this battery to believe how slim it is. Slip this battery into your T28 phone and the battery will be completely flush with the back of the phone. It won't bulge out like the other batteries. If you are interested in small size, so you can carry your phone unobtrusively in a pocket, then the relatively high price is worth it.The drawbacks of course are the high price and the relatively low battery life. Battery life is good enough that you can talk relatively often and still charge once a day. If talk time is your thing, get the 1400mah extended life battery instead.