Unbrick / Repair Dead Samsung android Phones

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Your Samsung android phone is dead due to some mistake :(
and you are shouting on us & developers , but please wait a sec before throwing your phone to customer care
although we are not responsible for your device damages but we can help at least. Good news is as always we have a solution :)
Method 1.

  1. Switch off your phone
  2. Reboot in recovery ( Middle key + Power on )
  3. and select wipe cache
  4. then select wipe data/factory reset
  5. Try to boot in download mode , and flash firmware using Odin
Method 2.

***in case if you are unable to boot in download mode then
Try Volume Down + Volume Up + Power on to boot in download mode
Or
  1. Remove battery
  2. and press volume up + volume down +power on
  3. now without releasing buttons insert battery
  4. Once you are in download mode you can flash firmware using Odin