AT&T network constantly disconnects

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http://forum.xda-developers.com – I'm not sure if this is in the correct section or not but I am having a very irritating and annoying issue with AT&T. I previously had a Moto Atrix 2 that ended up ****ting out on me due to faulty hardware (and then Moto wouldn't honor their warranty) so I bought the Sony Xperia ion since I have always liked Sony and their products. In between my Atrix dying and buying my ion I was using a very outdated (but amazing for its' time) Sony Ericsson w810i as a backup phone. The W810i kept giving me issues with my SIM card, it was always ever one of two error messages: The phone would make a n (HowTos)