オリジナル投稿者： Mike Troxel ,
Its a hardware issue. I have read that it might be a ground issue. DO NOT fork out the money to replace it yourself. Take it into the Sprint store and demand that it be fixed or replaced. I allowed them to convince me that it was because I "sat down with it in my back pocket and the digitizer is broken". After replacing it myself (and voiding any warranty), I learned that this is a common issue with this phone.