Searching for GSM signal?

[LS1]

JTFC.

The phone IS set for CDMA, it only shows GSM after you cause it to have a malfunction by pressing the menu button. THere is no GSM antenna, even if you set it to GSM only it won't search for one, and more importantly, it won't use any battery because there's nothing to use it.

 

[jersey221]

I'm not sure if this has been posted here yet, but I found this interesting. A friend of mine is a member of the EVO Facebook group and sent me to a link which reads as follows:
"For those of you having battery issues I found a way to DRAMATICALLY improve the battery life.
First things first, go into Settings> About Phone> Battery> Battery Use> Cell Standby. Assuming your phone has been on, or off the charger for ~10 minutes, it should show Time Without Signal at around 50%.

Next thing, press HOME, and bring up the dialer. Dial *#*#4636#*#* (Do not press "Call"). After a second, it should bring up the "Testing" menu.

Go into Phone Information, press MENU, and tap "select radio band." You should experience a Force Close, don't panic, this was supposed to happen. Scrolling down shows that the preferred network type is GSM auto (prl).

What this means is that even though you are connected to a CDMA network, your phone is trying to find a GSM network, preventing the radio from sleeping, and causing excessive battery drain.

Remedy this by tapping GSM auto (prl), and changing it to CDMA auto (prl).


Now your done, your TWS should drop dramatically, and you should experience much better battery life!

Note: You need to do this every time you reboot."

I've changed it on my phone just now, and the service still works as normal. I guess we'll see if the battery life increases. If this works and with overclock widget I should be getting some crazy battery life now!

this was a trick for the sprint hero also.

 

[Mattman10987]

OK, so there is no GSM radio or antenna, and it's vestigial from Android, which can also be used on GSM phones...I get that...but depending on where in the process the GSM versus CDMA decisions are being made, could it be that the CDMA radio isn't able to find the expected signal type (in this case, GSM) so it keeps trying to find it by continuing to increase the power?

My Moments had horrible reception and battery life and the radio was almost always showing GSM; on the other hand, my Evo has yet to show anything other than CDMA (prl) and my reception is way better and the battery life is far better than Moment and superior to what I was led to expect.