yes mine does same thing . I can hit it on the bottom of the phone when it has shut down .. Then the red led indicator will come on and it will reboot. So it is something perhaps a bad solder joint ? My friends did same exact thing.
Every time I see a referb phone add I select purchase and get referred to ATT my local service center and no referb phone available there . I haven't really spent a great deal of time looking for new phone because my funds are so limited at moment. Referb would do me just fine just need to find one.
I guess that I will take apart this one
and check the board to look at why this obvious defect is happening if it is something loose it can be repaired! I can do it unless it is inside of some component ! It unusable as is so really have little to loose