The Samsung Galaxy S II is a smartphone designed, developed, and marketed by Samsung Electronics with Android 2.3 "Gingerbread."

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My phone will not turn on, I have tryed everything

before the Samsung Galaxy S II SGH-I777 phone will not turn on i try to flash because it is on boot loop mode i mean when i power on the Samsung logo will come again and again i try to use Siyah-v3.4.2-nomswap-I777 n it shows the yellow triangle after that i guess i use other firmware it replays warning n after dat it is not working it looks like dead i don't know what can i do

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Dcooke, not sure if your flashing attempt bricked your phone or if it had issues before and you tried to flash it because of it. The very first thing you want to start with is a fully charged battery. You should have 3.6V on the battery and replace the battery if it is under 3V. If the battery is okay consider changing the power-key flex. After that you are looking for repairs on the board itself. Let us know what you find.

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