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3

You can either upgrade to L via TWRP itself (some reported having trouble with TWRP 2.8 and suggested trying 2.7) or revert from TWRP back to stock recovery if you want to go the OTA way (I guess that's what you're trying to do, you're not clear on that in your question). Also instead of TWRP you can try ClockworkMod recovery. edit: typo


3

There is no fastboot mode on Samsung. You must use the ODIN mode, which is an alternative to fastboot. On Linux there is a client application called Heimdall which talks to phones via Odin mode. So the answer to your question is ODIN or Heimdall. ODIN is the proprietary Samsung PC application, Heimdall is multiplatform open source alternative. ...


2

Finally I found the way: Turned it off and then connect it to computer, adb found it as recovery then i ran adb reboot recovery and then it reboots to recovery. I found that volume up and down keys are semi broken and for this reason it could not to load recovery mode.


2

You can't protect your recovery with a password. It's useless because if someone has physical access to your phone, he could just boot into download/bootloader/fastboot mode and flash a custom recovery to bypass any security on your phone. This is also the reason why no recovery offers password protection.


1

To put it simply, it is not designed for users to "boot from Memory card" as you put it. It is an embedded device and is designed as such. Android devices are typically not meant for the end user to install software via external media. They are specifically designed for additional software (not new OSes) to be loaded via some network connection. The ...


1

You have a very vague question, but generally speaking there are a few ways to boot into recovery mode: Most devices have a key combination that should be held down when powering on. You can find many of them on CyanogenMod's wiki. Search for your device, and if it's supported you'll usually find the instructions on the Info or Installation page. If ...


1

The answer for me involved a number of things, but I think one is really the key. Use the "recovery" Command, bro This uses CyanogenMod's/AOSP's recovery program to wipe the user data and disable encryption. (found in this answer on Stack Overflow) Boot into your recovery, and then from your computer run adb shell recovery --wipe_data ...


1

I use the Nexus Root Toolkit for Windows by wugfresh, it will allow you to unroot and revert to stock with a button click. It also includes full instructions on any setup you need to do prior. You can find it here: http://www.wugfresh.com/nrt/. It will also allow you to choose TWRP or ClockworkMod if you wish and can help you install new ROMs too.


1

I had the same problem once. but I could access the notification drawer. and I had a battery booster installed. So , I clicked it and clicked the rating button. It went directly to Google play and find the app's page and open it. You can unfreeze it then.



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