Do you have 2g signal ? Or you don't have any signal at all ...
i only dont have a 2G signal , 3G/LTE works still fine and without any problems, but while driving outside the city i often have 0 signal because i dont have 2G (before this bug happend i had always 2G outside the city)
Go into settings and look where it says more. Click on it and it will say mobile networks. Click here to set the type. Mine is worse on 4g so I switched to 3g only to save battery. There is something wrong with lollipop and the 📶. I've got a solid triangle with H. No movement or h+. End 4g is so weak it's switched off as I said. Try the setting.
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