[Q] boot custom recovery without install? - T-Mobile Samsung Galaxy S 4

I was able to boot a custom recovery without flashing it on HTC devices using fastboot. Samsung device does not have fastboot but is it possible to boot a recovery without having to flash it? I like to have my devices as stock for OTA updates.

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OTA Updates With Custom Recovery

OTA updates with custom recovery
Hi. I have last 5.1.1 and stock recovery and kernel. I want to flash this http://forum.xda-developers.com/sma...overy-twrp-2-8-3-0-sony-smartwatch-3-t2986907
will be any problems with OTA's if I do that?
Thanks
Why do you want to flash it?
Fastboot boot <twrp.zip>
Yes, if you copy over your recovery, you risk not getting updates. Of course, you could back up your recovery and then flash this.
If I boot the recovery will work?
I want it to wipe caches
Yes. It should work.

My Zenfone2 unable to boot into recovery mode after i flash twrp.img

Hi guys,
I just Root my phone and tried to flash recovery.img from twrp. After I did and it restart but keep boot into bootloader, I tried to boot into recovery mode and it's failed. What I try, boot into recovery mode via tethered temp recovery and flash a new rom which I downloaded here. Now the problem... My phone bricked and unable to boot into user surface.... HELP!!!! please!!!:crying::crying::crying:
You must unlock the bootloader to have twrp.
And some rom require unlocked bootloader
you want TWRP ? please unlock bootloader first
Use fastboot to reflash a stock rom and recovery.
Then unlock your bootloader and flash twrp.
Afterwards, you can flash a custom rom.

[HELP] Oneplus 3 wont boot into recovery

So i have a Oneplus 3 that won't boot into recovery, but does go into fastboot it also doesnt boot into the rom, im trying to flash stock rom and stock recovery.
How would i do this, if possible?
Setup adb and fastboot on your PC/ Laptop. (Google if you don't know how to)
Download stock recovery and stock Oxygen OS from official oneplus website.
Boot your device into fastboot. Flash stock recovery. Boot into Stock Recovery. Select ADB sideload. Sideload stock Oxygen OS. (The steps can be found easily on XDA. Just SEARCH).

stuck in boot loader

hi need help pls
my phone is stuck in bootloop and i cant go to recovery i have tried everything else on the net nothing seems to work i think i have soft bricked my phone pls help
hi for me was the following link succesful
http://forum.xda-developers.com/oneplus-3/how-to/guide-mega-unbrick-guide-hard-bricked-t3405700
Boot into fastboot. Flash stock recovery via adb. Boot into recovery. Sideload stock OS
OR
Boot into fastboot. Flash TWRP recovery ( official / modified). Boot into recovery. Wipe. Flash 3.2.7 Firmware. Wipe. Reboot into recovery. Flash custom ROM + gapps of your choice.

Question fastboot still works if recovery bad?

I plan on building AOSP following the Sony insctructions. If for some reason I flash a bad recovery can this phone still boot in fastboot mode with a broken recovery? I'm asking because recently I had a friend brick his Asus phone because you need to boot into recovery to be able to go to fastboot. I didn't expect that since on my Xiaomi you can go straight to fastboot without recovery..
fastboot is separate from recovery on this phone, yes.
Also, you can test the recovery first without flashing by using fastboot boot recovery.img, it boots into the recovery image without flashing it.

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