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!!! PLEASE DO NOT COPY ANY INFORMATION FROM THIS PAGE WITHOUT MY PERMISSION !!!

 
 

based on the steps posted by MacTavish in Post #44 of this thread -> Razr Dun does work at 1x! Here is how I did it.. Verified by me on my V3C, and wnrussel's V9M.

This page instructs you how to disable EVDO on your V3C/V3M/K1M/V9M/Z6tv and others.

Why do this?  The phone uses EVDO for data services only, in some areas, EVDO is not completely rolled out, or there are "fringe areas".  As the phone switches between 1x and EVDO modes, it can drain the battery faster.  Disabling EVDO (or forcing the phone to 1x mode), can and does help this.

NOTE: Verizon's VCast service requires EVDO.  However, other than DATA being "slower" this fix does not harm anything.

NOTE: Do the wrong thing in test mode and you will mess up your phone!!!

NOTE: this must be re-done if you do a *228 opt 1, or *228 opt 2 on your phone!!

The process...

Enable Test mode...
   #073887*
   for security code enter 000000
   press OK.
   arrow down to test mode...
   press right soft menu key to select.
   Highlight Enabled and press select.


To enter test mode... Press CLR followed immediately by the left soft key. (Timing is critical!!) You will be brought to a white screen with a "blue" FTS in the top center and the phone will be unresponsive for a brief period. If that doesn't work you can try.... Press and hold END to exit out and power off, then power the phone back on.. And you should be brought into the FTS screen. NOTE: On some phones, test mode being enabled doesn't survive power off/on.

Once in test mode... Press the right soft menu key 3 times to get the the screen with ServOPT: at the top... and HDR PREF as a choice.

Use the down directional arrow aprox 5 times to select HDR PREF...
Press the right soft menu key to change it to CDMA.  NOTE: phone may become unresponsive for a few seconds...

OPTIONAL: use the down directional arrow once to select HDR Hybr: and press the right soft menu key to change it to OFF.  (This is a case of "your mileage may vary", some DO need to set HDR Hybr: OFF!!) NOTE: phone may become unresponsive for a few seconds...

Press the CLR key quickly followed by the left soft menu key to exit you out of test mode.

Disable Test Mode...
   #073887*
   for security code enter 000000
   press OK.
   arrow down to test mode...
   press select.
   Highlight DISABLE and press select.
   Press END to exit out of all...

To Re-enable EVDO,

use the same steps, however set HDR PREF to "auto"