No Signal Sign on Samsung S3 GT-I9300 Possibly After Deactivating Mobile Tracker
I too have a Samsung galaxy 3 that I brought in 2012. This morning the same error message and a warning triangle appeared on my phone for the first time. I contacted Samsung support - the rep hadn't heard of this issue before - but talked me through a factory reset. Did this and the triangle &amp; message have gone. Would have liked to have found a solution that didn't involve a factory reset though. (She also advised me to delete my Google account first - bcos otherwise apparently it's a little difficult to reinstall afterwards..)