Quote:
Originally Posted by Johnny.Bravo
OK I have another question about this. The cell coverage where I work varies drastically depending on where I am. I spend a lot of time driving around remote areas where there is little or no coverage. Will this affect the radio? And should I reset it after spending a long time out in the middle of nowhere and then come back into town?
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In this instance, it won't affect the radio. No need to reset again after doing it the first time.
Quote:
Originally Posted by Johnny.Bravo
I copied this from the above xda link:
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*1111# (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 changed the the dialer code to the one that blazinazn listed (the op was for the HTC Hero - the one in red is for the Epic). Once you scroll down to "Select Preferred Network Type" you can change it from WCDMA preferred to CDMA auto (prl).
I just changed mine. I'll report back in a few days and let you know what happens.
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Whoops, there was another thread about this for the Epic as well...here it is:
[Q] Time without signal > 50% - xda-developers
I wasn't able to get any changes to stick in the menu by just selecting it. If I select CDMA preferred and back of the menu and go back in, it'll just go back to default. The only way that I have successfully reset the radio and show "unknown" is by toggling airplane mode..