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What changes does factory reset really make?

What does factory reset in Sense settings actually do and is it the same as Factory reset in the bootloader menu? I'm asking because I was told by HTC support to do a factory reset even when I told them that I have successfully installed two different RUUs. Will the factory reset make any changes that the installation of an RUU doesn't make?

Same here, have a Factory Reset Question...
I'm currently running custom rom Android Revolution hd 3.6.9 - if I want to reformat and reinstall the rom, since I have so many apps already, and I just want to refresh, can I just hit settings / SD & Phone storage / Factory Data Reset?
Or do I need to re flash the same custom rom under recovery?
Or do a factory reset under recovery?

factory reset simply takes the rom at the state where it bootet the 1st time. the rom you have installed that is. so yes you can use it as a frest start, no need to flash it again. it doesnt do any changes that shouldnt be there. just puts the phone on it's initial state where your current rom booted the first time.

[Q] No OS Installed for Nexus 5?

Hello everyone I am scared I bricked my phone.
So I tried installing a rom and did a factory reset deleting everything (including the OS). I did root the phone but something went wrong so I factory reset it. Now when I press the power button I get the "google" black screen and nothing. I then shut it down and went to the bootloader. I stupidly forgot to recover my old stuff like an idiot and now the phone has OS.
Can you help me with a step by step guide to restore this phone?

Flash the factory image to get it back to stock (see nice, big sticky thread in General), then try again

am3606 said:
Hello everyone I am scared I bricked my phone.
So I tried installing a rom and did a factory reset deleting everything (including the OS). I did root the phone but something went wrong so I factory reset it. Now when I press the power button I get the "google" black screen and nothing. I then shut it down and went to the bootloader. I stupidly forgot to recover my old stuff like an idiot and now the phone has OS.
Can you help me with a step by step guide to restore this phone?
Click to expand...
Click to collapse
Factory reset is a misnomer, as it does not restore the phone to its factory state. All factory reset does is erase the data partition (along with cache and internal storage obviously). Any changes you make to the system ROM, kernel, recovery, etc. persist after a factory reset. The only way to restore the phone to its factory state is to flash the factory image. Refer to the tutorial to flash the factory image. Next time do your homework before you start tinkering.

Pressed factory reset by accident

Now it's my turn. Pressed factory reset by accident in boot loader. Can get to TWRP but it says E: Unable to mount storage
e:Unable to mount /sdcard/TWRP/twps. when trying to read settings file. etc...
Advanced File manager in TWRP shows /sdcard/TWRP
Any ideas???? If I try to mount data in TWRP my Mac wants to initialize.
Thanks
TWRP shows internal storage 0 mb

I flashed the stock recovery, then ran it and somehow it booted right into CM11. Everything was lost, but it's working again.

Factory reset wipe everything! Including SD card.

null0seven said:
Factory reset wipe everything! Including SD card.
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Click to collapse
Possibly, but how come CM11 was still on there? I think that the Boot Loader in Moonshine's factory reset is not compatible with CM11. Luckily the stock recovery fixed things for me.

808phone said:
Possibly, but how come CM11 was still on there? I think that the Boot Loader in Moonshine's factory reset is not compatible with CM11. Luckily the stock recovery fixed things for me.
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Click to collapse
I had the same issue, pressed by mistake factory reset in bootloader some time ago. I was pressing vol down to reach recovery, there was a slight lag and I pressed it a second time the immediately I've pressed power...so cursor has jumped 2 rows then executed. I've solved it only by flashing stock recovery and resetting to factory settings again, then flashed TWRP.
Now why you still had CM11...well not 100% sure but in TWRP when you wipe to factory the system partition is not formatted. I've paid attention once to the messages during a wipe and it was formatting data, cache, dalvik and android secure but not system. A reason can be that while flashing any ROM, the install script formats system at the beginning so theres no need to do that with factory reset.
Now I can only think that the factory reset from bootloader does the same and system is not wiped. Theoretically it is correct...system is read only especially on a stock non rooted device and resetting it to factory practically means that any trace of personal settings/aps and so on should be erased. And those are not stored on the system partition. There is also no hidden place on the phone where a recovery image of the original android OS is kept so this is not like on the laptops where you reset to factory and Windows is reinstalled from the recovery partition. My guess is that the factory reset just wipes all partitions that contain personal data and settings and leave system intact. So after a wipe and reboot is like you first start it.
You still had CM11 cause the wipe didn't format system...If anyone has a better explanation I would be glad to hear it. So From my point of view nothing went wrong and has nothing to do with the Maximus recovery or it's compatibility with CM11. It would have happen the same if you have used any other stock recovery

Factory reset, resets youre phone to original settings.
Anyway, its good that the phone works.

null0seven said:
Factory reset, resets youre phone to original settings.
Anyway, its good that the phone works.
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Yes. And it is not formatting system when doing this. So any os is installed will be kept
Sent from nowhere over the air...

Rapier said:
Yes. And it is not formatting system when doing this. So any os is installed will be kept
Sent from nowhere over the air...
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Click to collapse
I don't want to try it again but I wonder if moonshine's factory reset is incompatible with cm11?

Dont understand what do you mean by "incompatible". The factory reset from bootloader is not the same thing as the one from a custom recovery. You shouldn't do a factory reset from bootloader regardless of the ROM you're using
Moonshine is an S-Off method, I didn't used it myself so I don't know what factory reset option is in there
Sent from nowhere over the air...

I never said anything about the custom recovery. If you should never use it, why is it there and why does it make the SD card not available?
Wow, HTC says you can use it here:
http://www.htc.com/us/support/htc-one-x-att/howto/313779.html
I'm sure you know something others like me don't, but I when I mean "incompatible" I mean that I don't believe that it should make the sdcard unavailable and make the phone think it has zero MB. I think what you might have missed is that I used factory reset from the custom boot loader from moonshine. I was wondering if that factory reset was compatible - that's all.
Again, it was a mistake - it's not like I chose it on purpose. Thank you for the help.

808phone said:
I never said anything about the custom recovery. If you should never use it, why is it there and why does it make the SD card not available?
Wow, HTC says you can use it here:
http://www.htc.com/us/support/htc-one-x-att/howto/313779.html
I'm sure you know something others like me don't, but I when I mean "incompatible" I mean that I don't believe that it should make the sdcard unavailable and make the phone think it has zero MB. I think what you might have missed is that I used factory reset from the custom boot loader from moonshine. I was wondering if that factory reset was compatible - that's all.
Again, it was a mistake - it's not like I chose it on purpose. Thank you for the help.
Click to expand...
Click to collapse
The reset to factory from bootloader exists because on stock ROM there's no custom recovery that has that option....so it's in bootloader. For it to work properly though, you must have the stock recovery also. If you have a custom recovery like twrp/cwm and use the wipe from bootloader it'll mess your sd cause phone is not able to perform the wipe properly with that custom recovery. That's why, in order to get back to normal you should flash back stock recovery and perform the wipe from bootloader again.
Sent from nowhere over the air...

Thank you for the clarification. It makes sense. Too bad that reset is so close to the recovery command. It's pretty weird that I didn't have to run the wipe from the stock boot loader again. It ran and rebooted the phone into CM11. Anyway, I am glad I am back to running. Thanks.

[Q] Random Reboots

No matter what rom i'm running I get random reboots. I even took the update from Verizon to 4.4.3 and still recived random reboots. Is this just me? I have also ran safe mode and get them.

Have you tried a factory reset?. If not try that. Don't do it from security settings though. Do it through fasboot. Just be sire to save anything you don't want to lose.

Yes and have tried multiple roms. IT does it not matter what rom or what settings I have.

Sounds like a complete wipe via fastboot may be your only fix. Just be sure to back up all the stuff youbwanna save cause it gonna wipe it clean. I am stock and was having same issue did the reset and everything fine now. I however forgot to make a back up lol

How do I do that? I tried the factory reset option and it took me back to TWRP

Make sure quick boot is turned off in battery settings. Then power down device. Power back on holding down volume and power. Your phone will boot to a white screen. Then use volume down to cycle to factory reset. Only thing is I'm not entirely sure what it will do to s-off and unlocked bootloader. You may want to Google that and see what it says

I've had my m8 for several weeks and never had a random reboot, that's on both stock and custom Rom. If the factory reset doesn't fix it, you may have a hardware issue

Factory reset doesn't work on a custom recovery

tjamscad said:
Factory reset doesn't work on a custom recovery
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Click to collapse
Better: You should not try a factory reset from settings if you have a custom recovery installed. It can lead to unintended consequences......
And why would you? That's what a recovery is for! TWRP and CWM both have the factory reset option, which basically just wipes /data (without /data/media), cache and Dalvik. And that's what you need 95% of the time. For the rest format data.

A factory reset doesnt clear everything. I have done a few and nothing ever seems to be reset. When I did it from hboot I was required to set up phone again as if it had just been powered on for the first time.

berndblb said:
Better: You should not try a factory reset from settings if you have a custom recovery installed. It can lead to unintended consequences......
And why would you? That's what a recovery is for! TWRP and CWM both have the factory reset option, which basically just wipes /data (without /data/media), cache and Dalvik. And that's what you need 95% of the time. For the rest format data.
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For the record,twrp wipe was what I was referring to when I said factory reset. I thought about saying wipe, but was afraid of how that might be interpreted.

mdorrett said:
A factory reset doesnt clear everything. I have done a few and nothing ever seems to be reset. When I did it from hboot I was required to set up phone again as if it had just been powered on for the first time.
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Click to collapse
A factory reset in TWRP (at least on every version I've used) wipes /data without wiping /data/media, cache and Dalvik.
Meaning it wipes all your apps and settings without wiping your personal files, but rquiring ou to go through setup again. Just did exactly that before installing CleanROM 2.0. If you had a different result I don't know which option in TWRP you chose.....

Help required, "Enable OEM unlock" disabled with TWRP installed

Hi everyone.
I've been trying to look for a solution for five days now, and I can't find anything over here (or maybe my search skills are bad?)
Anyways, I have a Mate 8 NXT-L29C185B580 with unlocked bootloader, TWRP installed and rooted, however FRP is locked since "Enable OEM unlock" is disabled. It so happened that I accidentally restored default settings in developer options, causing the switch to be disabled again and since it is greyed out I can't turn it back on.
From what I gathered here on XDA, to access this option again I need to relock bootloader, but to do that I need the stock recovery which I can't flash due to the FRP lock.
What I'm trying to do is to go back to full stock. I have the update.zip of B580. Dload fails, so does flashing through TWRP.
I'd appreciate it greatly if anyone can help me out, losing my mind over this, although I'm probably going at it the wrong way

Okay so the problem is solved.
Downloaded B560 using link from firmware finder (since downloading from app itself was problematic), booted into TWRP and performed factory reset + advanced wipe dalvik cache, cache, data and system and flashed the two .zips. Afterwards booted into stock recovery and performed factory reset from there since phone wasn't booting. Finally I re-locked bootloader using fastboot and thus was able to access oem unlock option again.
Posting this here incase anyone else gets stuck in a similar situation.

zxc2.0 said:
Okay so the problem is solved.
Downloaded B560 using link from firmware finder (since downloading from app itself was problematic), booted into TWRP and performed factory reset + advanced wipe dalvik cache, cache, data and system and flashed the two .zips. Afterwards booted into stock recovery and performed factory reset from there since phone wasn't booting. Finally I re-locked bootloader using fastboot and thus was able to access oem unlock option again.
Posting this here incase anyone else gets stuck in a similar situation.
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Click to collapse
im having the same problem but unfortunately i cant flash anything getting error 9 will OEM be enabled by just factory resetting and wiping?