My smartphone model is Doogee Leo DG280, It uses android OS, and yesterday it started acting very weird regarding the touchscreen; whenever I push the lock screen button, and push it back again to unlock it, the touchscreen simply dies, it won't respond or do anything at all, yet the phone is fully functional cause I still receive texts, can adjust volume, etc. It's just the touchscreen that dies Every time I reboot it (have to remove battery for this, due to touchscreen being dead), it gets fixed, until I push that button again, then the problem starts yet again I already did a factory reset on it, and the problem persists, any suggestions? Thanks in advance