In the past, we have posted a number of methods to root your Samsung Galaxy S2 (II) device first method involved using the Odin and SuperOneClick, and the method that we posted more recently and is indeed the preferred method requires the use of a suitable CF-Root kernel that needs to be flashed through the Odin. But many users after rooting the Samsung Galaxy S2 (II) device might notice an annoying yellow warning triangle during the boot process. Its not a big issue, and it does not effect the functioning of your device in any way. But if you want a more cleaner look and want to remove the yellow triangle its possible.
Chainfire from XDA forums has a very nice step-by-step guide to remove this warning triangle that I will quote as its pretty detailed and can be easily followed.
(1) Make sure you have CF-Root flashed (see the first post). You must have the "CWM Manager" app available.
(2) Make sure you have the same version of CF-Root extracted until you have the zImage file. (ZIP –> extract –> TAR –> extract –> zImage).
(3) Push the zImage file to /sdcard . It must still be called zImage !
(4) Find an original Samsung signed stock kernel (preferably from the same stock firmware you have, but it’s not terribly important)
(5) Reboot into download mode (adb reboot download, or boot the device with home and volume-down pressed)
(6) Fire up ODIN, and flash the Samsung kernel
(7) Boot the device with the stock kernel. CWM Manager will still be available.
(8) Start CWM Manager, select Flash Kernel, and select the zImage from CF-Root you previously put on your SD-card. The kernel will flash and the device will reboot.
(9) You will now notice you no longer have the warning triangle during boot, but you are actually running CF-Root with all it’s goodies!
(10) In the future, if you only use the Flash Kernel option inside CWM Manager instead of ODIN, the triangle will not return, neither will your flash counter increase. But keep in mind, that CW
You might also be interested to have a look at the Samsung Galaxy S II section on our website where we have covered a large collection of tweaks, tips&tricks and rooting and custom ROM installation guides for the Samsung Galaxy S2 (SII). Also take a look at this article, where we have posted a Huge Download List of Insecure Kernels/Firmware to Root Samsung Galaxy S2 (SII)!
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