General rooted unlocked but loses service

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http://androidforums.com – I rooted and unlocked my captivate glide and it was working fine then sound started acting funny and I lost service when I go to check mobile networks it says insert Sim card for network acesss thinking it was the Sim inserted it into original phone and works fine did I do something wrong in the unlock process or is there maybe something else I'm over looking something......the phone will usually start working after a few days.... (General)