Software update problem

[adv123]

Whenever I go for software updates, it appear 'your phone operating system has been modified in unauthorized way'. Please give the solution..

[Saadi121]

Hard reset kry

[nadeemaq]

Seen

[03009337001]

Aap ka set rooted hai.. or Imei change b hoga yaqeen. Q k root ya tho imei k lute kia jata hai ya games cheat k liye