I had a Nokia 822 that for the first 24hrs worked great. Then I started having issues with my text notification. I reset the phone and it works perfect. I know it's a bit time-consuming, but it was worth it for me. When I look back, I believe I saw a problem with it, but didn't know it at the time. When I was on windowsphone.com and I was trying to reinstall my app, when I was clicking on Reinstall on the far right side, I kept getting a message saying the service couldn't connect to my phone. I think it was telling me then, there was a problem. Hope this helps.