My phone has no signal, 0 bars and X service, tried putting the sim on other phone and it works, i have tried to reboot and factory reset, still no luck. And it stuck on WCDMA only, cannot be change from netword setting and mobiles code, it just reverted back to WCDMA only, my phone is Lenovo Vibe Shot, the shop ask me to hand in with the waranty for a 3 weeks time, that ammount of time is too lengthy, because the school is incoming, and phones are vital there for research and transportation.