##TTY# (889)
Enables/disables TTY.
##GPS# (477)
This will give you location, altitude, speed, and accuracy information gathered via GPS.
##RTN# (786)
This the Phone Information page. It tells you how many minutes the unit has on it, how much data has transpired, the warranty date, ESN, phone number, software and hardware revisions, refurbished status, etc. Note: Please be careful with the options in the pull-down menu.
##DEBUG# (33284)
CDMA phone info screen, which contains a bunch of technical data on your curent signal and tower connection. Signal strength is given as RSSI, which stands for Received Signal Strength Indicator. The closer to zero the RSSI value, the better the signal.
##EVDO# (3836)
Launches EVDO Settings. It gives you the options to force your pre into the following options: 1xRTT only, EVDO Rev 0 only, Hybrid Rev 0, EVDO only, or Hybrid Rev A (meaning pick the best available). Hybrid Rev A is likely to get you the best speed, but if you don't have good reception in your area, you may want to choose something else to conserve battery life.
##DATA# (3282)
This stores all of your Sprint Data login information, including default gateway, etc. I don't recommend changing these settings unless your data services are not working.
##VPON# (8766)
Voice privacy enabled.
##VPOFF# (87633)
Voice privacy disabled.
##(MSL)# (Whatever your phone's MSL is)
This allows you to see/change your number. Do NOT change this to a number without notifying Sprint, or your phone will no longer work.
Please exercise EXTREME caution when using the following codes...if you do something incorrectly, your phone will NO LONGER WORK, and you will have to contact Sprint technical support.:
##AKEY# (2539)
Allows you to re-enter the 26-digit AKey on CDMA devices. Note: An incorrect AKey will deactivate the phone and you will need to contact technical support for the AKey.
##PREV# (7738)
Opens Mobile Protocol Revision menu.
Via- LarrySteeze @Precentral.comEdit: I changed the color of the font because the orange could be a bit hard to read with the new default theme. -Ryu78
