[One (M7) Q&A, Help & Troubleshooting] Argysh:
There's plenty of threads about not being able to get into recovery anymore but none of the descriptions quite suited my problem nor did the proposed solutions help me.

Here's my situation:

My phone boots without problems and is usable, just getting into recovery doesn't work. So this is not the "HELP!!! FAST!!!!111!"-kind of topic, I got time.

I was runing ARHD for a little more than a year now without any problems and decided it's time to updgrade to the current version.

So trying to enter the recovery mode for the first time again I got the white loading screen and nothing happens within my span of patience (~10min). Weird, it worked well when i installed arhd and i haven't changed anything on this level ever since ...

Remembering how that helped last time I erased the cache with fastboot and tried again. didn't help.

Then I tried to flashed the newest CWM (specific version for M7) with fastboot and it results in an error:

sending 'recovery' (9184 KB)...

OKAY [ 1.229s]

writing 'recovery'...

(bootloader) Format partition SOS done

FAILED (remote: err = 0xa)

finished. total time: 1.460s​

trying the same with the most up to date and older versions of twrp, cwm and philz. i'll always get this error and the symptoms of booting into recovery (after wiping the cache) are still the same in some cases he would just reboot back to hboot when choosing recovery there.

Since this didn't seem to work i tried installing both twrp and cwm with cwm's Rom manager app. It claims to have flashed the recovery but it's still the same result.

Trying to flash with any of the toolkits (hasoon's and squabbi's) shouldn't result in any difference since it just utilizes fastboot commands.. tried it nonetheless and jep, same error as above.

So last Idea I had was to get a suitable RUU and go back to stock.

I relocked the phone, went to oem rebootRUU, waited for the black screen an tried to flash the zip. this is the result:

fastboot flash zip RUU.zip

sending 'zip' (1012366 KB)...

FAILED (remote: Heap not enough)

finished. total time: 0.007s​

so I guess there's not enough space here... but where exatcly?

I've unlocked it again, bootet it and had a look at t current levels of free space. Which are 2.04Gb for apps and 12.27GB on the main storage. shouldn't that be enough to allocate a sufficient amount?

What else might cause this error? or am i heading in the completely wrong direction?

Any suggestions how I can get back to working recovery would be highly appreciated.

thanks for listening

fyi 'getvar all' gives:

fastboot devices

HT23PW116936	fastboot

fastboot getvar all

(bootloader) version: 0.5a

(bootloader) version-bootloader: 1.72.0000

(bootloader) version-baseband: 5.1204.163U2.31

(bootloader) version-cpld: None

(bootloader) version-microp: None

(bootloader) version-main: 4.17.111.3

(bootloader) serialno: HT23PW116936

(bootloader) imei: 359188041709346

(bootloader) product: endeavoru

(bootloader) platform: HBOOT-T30S

(bootloader) modelid: PJ4610000

(bootloader) cidnum: T-MOB101

(bootloader) battery-status: good

(bootloader) battery-voltage: 3706mV

(bootloader) devpower: 17

(bootloader) partition-layout: None

(bootloader) security: on

(bootloader) build-mode: SHIP

(bootloader) boot-mode: FASTBOOT

(bootloader) commitno-bootloader: None

(bootloader) hbootpreupdate: 2

(bootloader) gencheckpt: 0​