*3370# - Increases Battery back up power. (Working in 3100) *4720# - Increase Sound quality. (Working in 3100) *#92702689# - Make NOT- REACHABLE. *43# - Call Waiting #43# - Deactivate Call Waiting. *21# - Call divert. ##21# -Deactivate. *67# - Make busy. *61# - Make No-Reply. 100% TESTED.
Tuesday, 19 April 2016
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