[Galaxy S II General] dsixda:
Frequently Asked Questions

Q. I flashed CM9 after coming from another non-CM9 ROM, and I get errors or phone fails to boot.

A. Make sure you read the instructions in Post 1 for flashing correctly. If you still can't figure it out, go to the "advanced" menu section in the recovery menu and select the log output to see what went wrong. If it says you have an "assert" issue then you obviously have the wrong version of ClockworkMod recovery and you didn't follow the instructions.

Q. How do I restore my phone back to factory conditions so that I don't have a voided warranty?

A. Flash the stock Bell firmware (found at my dev-host link) with Odin. OR download the stock firmware by creating an account at sammobile.com and going to the Firmware section (search for SGH-I757M); then flash it with Odin.

Q. I'm not getting LTE (4G) speeds on my phone with CM9

A. By default the ROM is set to normal GSM (3G/HSPA). You can change it under System Settings --> More --> Mobile Networks --> Network Mode --> LTE/GSM. For some providers like Rogers you may need to manually add the APN for the LTE network as well. To verify you have LTE working, you'll see the "4G" icon on the notification bar. In addition, you can run the Speed Test app to ensure you get LTE download speeds like 25Mbps instead of 4 Mbps. Of course, all this depends on whether your location has LTE towers within its vicinity.

Q. Why do my buttons light up when I get a notification?

A. By default the Backlight Notification (BLN) is turned on. You can disable it under System Settings -> Advanced -> Sensors.

Q. The NFC options can be enabled in the Settings but why doesn't Android Beam work?

A. The device seems to not have the hardware support. The same problem happens in the stock Samsung firmware. However, the online user manual mentions the use of Tags, although when I tried with both stock Samsung 2.3 and CyanogenMod 9 they couldn't read the NFC tags (at the same time I was using an Xperia S and that was able to read the same tags fine). There is discussion going on in this thread stating that we may need an NFC-enabled battery and/or special battery cover. Click here for some debug info from the phone when we turn on NFC.

Q. If I power on the device while the charger is plugged in, it does not turn on. I need to pull out and re-insert the battery to start it again.

A. This is a known issue in CyanogenMod 9 and in AOKP, not just this ROM. You could also try unplugging the phone and holding down the power button for several seconds to turn it on.

Q. How do I access internal storage and also my micro SD card?

A. Internal storage is under the folder /mnt/emmc; micro SD is under /sdcard.

Q. Does FM radio work?

A. No, this device does not have FM radio hardware support.

Q. My battery life sucks.

A. Not my fault, I did not do some geeky tweaks or overclock your phone. The device itself has a crappy battery and you'll notice the same issues in stock. Click here for some battery-saving tips.

Q. I am a newb but want to help out with ADB and/or debugging an issue, how can I?

A. Read here. Also see the following posts on how to get the sources to build the ROM.