"Phone restarts" means that the phone is turning off and then turning back on again.
Sentences with «phone restarts»
Just reboot your phone, if it reboots from being dead or restarts it will prompt you for the passcode and cops can't make you give them that (redmondpie.com)
It felt sluggish at first, but a couple of phone restarts got it going properly, and now the Razr feels like a phone that was designed for this version. (pocket-lint.com)
«My iPad restarted, my phone restarted and my computer restarted, and that's when I got the cold sweat and was like, «O.K., this is really serious,»» said Chris Burniske, a virtual currency investor who lost control of his phone number late last year. (nytimes.com)