У вашего броузера проблема в совместимости с HTML5
This video is only tutorial purpose for your lost or null imei repair,
not to change,
Imei change is elligle
Only for restore your original imei
Vivo 1603 null invalid imei solution with umt dongle
You must have to enable diag port in mobile by dialing *#558# select diag port
& open umt dongle select qwalcom universal & repair your null or lost original imei