iPPhone won't turn on and won't go into DFU or Recovery Mode? Help please?


macrumors newbie
Original poster
Mar 15, 2012
I have iPhone 3G ios 4.2.1 It's jailbroken. Yesterday I installed SwirlyMMS because my iPhone doesn't send MMS.And then I reboot device but it didn't turn on.Now battery is finished. I tried everyway, it won't go into DFU or Recovery Mode. And iTunes doesn't see iPhone. What can I do?