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Hidden secret codes is a database containing specifications and features, secret hidden codes, tricks, cheats, hard reset, box logs(unlock, repair, diagnostic, recover). Here you can learn, solve, investigate, repair. Best hacks of cell phones and smartphones 1G (AMPS, NTM, TACS), 2G (GSM), 2.5G (GPRS), 2.75G (EGPRS), 3G (UMTS), 3.5G (HSDPA), 3.75G (HSUPA), 3.8G - 3.85G (HSPA+), 4G (LTE), 4G+ (LTE Advanced).