Why could you suggest could be the problem and how can I solve it?

[Choolwe123]

So I bought a Samsung Galaxy S6 SM-G920T from e-bay and I haven't been able to perform any single function it. It freezes and restarts itself every 30 seconds. I have tried factory reset, cache partition wipe and even flashed the exact firmware it was running on with Odin, but still the same outcome. It still freezes and re-boots itself every 30 seconds. I was assured everything works and the only problem was just a permanent image in the background of the screen, which is a screen burn-in I presume. I'm running out of ideas here, please assist me.

 

[Aquila]

Problem is fraudulent seller, solution is to return the device to the seller for a full refund.

 

[jasonandrews25788]

most probably it's a fake version.

 

[Choolwe123]

Fake version of what? The firmware? Cause I got the firmware from sammobile.