"Sign in to Network" after losing service, getting it back

anon(156336)

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Feb 3, 2011
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I'm on U.S. Cellular, and I've had a few instances on the M preview where after I briefly lose service (driving through a valley, etc.) and I get service back, it prompts me to "Sign into the Network" and LTE will not work until I do it. Frequently, it will fail, and require a reboot of the phone to get service again.

I've gone back to LMY47Z to avoid the issue, but I'm wondering if you guys have also seen this?