Phone suddenly overheats, 1 SIM stops working, can't make calls, etc.
1. Phone suddenly starts to overheat.
2. 1 SIM card stops working in it (works in another phone)
3. Other SIM card works/detected but says: "DIALLING" until it "timed out" or eventually goes through.
4. Battery then goes bad and swells.
5. Same problem even when battery replaced, it just drain the battery to nothing - literally!