Hi ther my colleagues I fell that these company has given out a vary cheap quality of product there a many problems in using these cell I had own one of the phone. the first that I had taken last for about 2 months so & after that there was a failure in battery failure I so had to buy a new battery for it. it started working again but after a week I was facing the same problem then later I came 2 know that the IC of the cell was defected & I would b facing the problem every 2 months so I guess the company should stop the production of T28 its a flop piece & wastage of money. The same problem was faced by 3 of my friends so better be alert if u r goin 4 these seires