[AT&T Samsung Galaxy S II SGH-I777] jivy26:
Join us on IRC #sgs2-att irc.freenode.net

Need help connecting to chat look here http://xdaforums.com/showthread.php?t=1291353

Frequently Asked Questions

****DO NOT USE ROM MANAGER! It will cause issues when you flash in cwm.****

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TABLE OF CONTENTS

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[1] What is Rooting?

[2] How can I root my Galaxy S2?

[3] What is CWM?

[4] What is a Nandroid Backup and how do I do it?

[5] How do I get into CWM?

[6] How do I put my phone into Download mode so I can flash w/ ODIN

[7] Drivers are not installing successfully or ODIN is not recognizing my phone.

[8] I can't find ODIN

[9] Ive rooted now why do I have an exclamation point on my boot screen.

[10] After rooting i've lost audio during conversations.

[11] Can I flash International Roms(I9100)?

[12] Phone is no longer booting up past boot screens?

[13] Can I unlock my SGS2?

[14] How can I overclock/underclock my phone now that I am rooted?

[15] Where is the FM Radio like AT&T advertised?

[16] What is the best ROM?

[17] How can I take a screenshot of my phone?

[18] Home button has a few seconds lag after I tap it what's up?

[19] Want WiFi tethering on stock rom?

[20] Getting "E: Signature Verification Failed" in CWM?

[21] Install Custom ROM from CWM

[22] What is the difference between the various governors available to me?

More Tips and Tricks can be found here

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[1] What is Rooting?

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Rooting your device means obtaining superuser rights and permissions to your Android software. With these elevated user privileges, you gain the ability to load custom software (ROM), install custom themes, increase performance, increase battery life, and the ability to install software that would otherwise cost extra money (ex: WiFi tethering). Rooting is essentially hacking your Android device. In the iPhone world, this would be the equivalent to Jailbreaking your phone.

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[2] How can I root my Galaxy S2?

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Yes. There are a few ways of obtaining root. All of which are listed HERE

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[3] What is CWM?

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Clockwork Mod(CWM) is a custom recovery for Android phones and tablets that allows you to perform several advanced recovery, restoration, installation and maintenance operations on your Android device that aren’t possible with the stock recovery.

**Recommended before flashing a new ROM**

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[4] What is a Nandroid Backup and how do I do it?

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A NANROID backup is basically a backup of your Android operating system from the phone’s NAND memory, saved to the storage card. It is RECOMMENDED to take a NAND backup of your phone before you attempt to flash a new ROM to it so that in case anything goes wrong, you can revert your phone back to its previously working state. HOW TO: A backup can be accomplished in CWM by simply selecting Backup and Restore from the Menu then selecting Backup. It will take a few minutes to complete so be patient.

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[5] How to I get into CWM?

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Pull the battery out of your phone to ensure it is completely off. Now hold down the Volume Up and Down buttons then hit the Power Button. Once you see the Galaxy S2 screen release the power button and Volume buttons.

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[6] How do I put my phone into Download mode so I can flash w/ Odin?

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Take out the battery from the back to ensure your phone is completely off, then put the battery back in. Now hold down on both the Up and Down Volume buttons and plug the USB coming from your PC into your SGS2. Once you see a warning screen let go of the volume buttons. Hit the Up Volume button to continue into download mode.

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[7] Drivers are not installing successfully or Odin is not recognizing my phone.

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The easiest way to install the drivers is to use Kies which can be downloaded below:

http://www.samsung.com/ca/kies/

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[8] I can't find Odin!

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http://megaupload.com/?d=M6CO8E1K

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[9] I've rooted now why do I have an exclamation point on my boot screen?

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Anytime you flash a non-stock kernel in download mode this will appear.

Work around method by Entropy512 to eliminate the exclamation on boot screen

OR

Explanation and Step by Step Guide on Rooting without setting off flash counter by creepyncrawly

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[10] After root I've lost audio during conversations.

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Visit this thread http://xdaforums.com/showthread.php?t=1286432 and download the modem package. Once you download the file extract it until you have a .tar file. Now open Odin 1.82 and click Phone then select the modem file. Click start and your back in business.

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[11] Can I flash International Roms(I9100)?

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Thanks to Entropy's Hellraiser you can now flash MOST i9100 ROMs check link below to find out how.

Link to Entropy's Hellraiser thread

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[12] Phone is no longer booting up past boot screens?

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Download kernel + rooted system package from http://xdaforums.com/showthread.php?t=1286432 and follow the instructions on how to flash using Odin on the page.

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[13] Can I unlock my SGS2?

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http://xdaforums.com/showthread.php?t=1289395

. I've confirmed this method works. If you want to check and verify you've unlocked your phone open up your phone dialer and type *#7465625# you should now see Network Lock [OFF].

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[14] How can I overclock/underclock my phone now that I am rooted?

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Entropy152 Daily driver is the only kernel that supports it.

http://xdaforums.com/showthread.php?t=1289460

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[15] Where is the FM Radio like AT&T advertised?

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As of right now the current stock software released by AT&T does not support FM Radio. If there is actually FM hardware to support is not known yet.

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[16] What is the best ROM?

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There is no perfect ROM and which is the best depends on personal preference. Click below to get to a list of all custom roms kernels, etc...:

Click Here

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[17] How can I take a screenshot of my phone?

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Hold down the home button and press the power buton.

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[18] Home button has a few seconds lag after I tap it what's up?

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There is a noticeable delay because of double tap home button mapping. If you don't use Vlingo (double tap home) and don't mind then flash this file in CWM.

Home Button Lag Fix

Original thread

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[19] Want WiFi tethering on stock rom?

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Using Root Explorer you will need to delete TetheringManager2.apk from System/App. Simple as that.

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[20] Getting "E: Signature Verification Failed" in CWM?

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One of two things happened:

1) You used ROM Manager even though it is listed in BIG RED LETTERS above. In which case flash codeworkx kernel and this time DO NOT USE ROM MANAGER.

2) Go into CWM click Install Zip from SDCARD>Toggle Signature Verification. Should see "Signature Check: Disabled". If it says "Enabled" then try reflashing kernel in Odin again.

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[21] Installing Custom ROM from CWM

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*Use home button to make selections*

[1] Download ROMnameHere.zip and place it on your SD card.

[2] Boot into Recovery

[3] Wipe data/factory reset

[4] Wipe cache partition

[5] Goto advanced

[6] Wipe dalvik cache

[7] Install ROMnameHere.zip

[8] Boot up phone

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[22] What is the difference between the various governors available to me?

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The kernel governor is the basic function that controls how the CPU responds to increased demands for performance. An excellent guide can be found here:

http://xdaforums.com/showthread.php?t=1420742