[JiaYu S3 ROMs, Kernels, Recoveries, & Other Develo] pfavayi:
Hello pfavayi, dear all,

remember I had problems to flash the mandatory 3.1.1. version of TRWP on a S3S. I followed your hints and I am back with findings, but with no breakthrough unfortunately ...

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Just to make sure we are on the same wavelength , we have and I will be assuming:

Jiayu s3s ( the 2GB version)

Jiayu s3A (the 3GB version)

Jiayu s3+ (the 3GB newer version)

"remember I had problems to flash the mandatory 3.1.1. version of TRWP on a S3S."

I have the s3A

" I followed your hints and I am back with findings, but with no breakthrough unfortunately ..."

Strange...

"- I have no glue how I could double check if the TWRP 3.1.1. is valid for the S3S (3GB) variant of the JiaYu S3,"

If you are talking about the 3GB version , then we have the same phone. I think the 3GB version is called the s3A.

But I will assume you are talking about the 3GB version (s3A)

I have been Flushing several variants of twrp 3.1.1 on my phone.

This is my Twrp 3.1.1-0 I had downloaded from the MadTeam link here on xda. It works on my 3GB version of jiayu s3.

https://drive.google.com/file/d/1wVHs-iXlXkWl4QEd-qFZnKbHRx9hzPpE/view?usp=sharing

And this is the Twrp 3.1.1-0 I had downloaded from needrom.com It also works on my 3GB jiayu s3

https://drive.google.com/file/d/1l6yTx_MzffS6aBSxcZHxI2sUS2AkCEgG/view?usp=sharing

If you want to flash MadOS, you better use their twrp , otherwise the flash will fail.

And because I have experience with RC5 , why don't you flash RC5, see if you can boot into both the phone and recovery, and then flash twrp 3.1.1 with the same SP Flashtool and the RC5 scatter file.

Remove your back cover and try and put it back as carefully as you can without disturbing the buttons, and keep holding the "vol up" button in the several attempts at booting into recovery you will make.

If you press the power button to reboot , the vol up button before reboot begins.

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Sometimes the problem is not The twrp itself is such, it's us.

We Enter recovery by simultaneously "volume up" and "power" and releasing "power" just after the vibration.

Keep pressing "volume up", and if it reboots keep pressing "volume up".

You might need several attempts to get into recovery. At the beginning I would succeed after the 4th attempt.

So keep trying.

Sometimes after we open the back cover , it is not replaced properly and therr is insufficient contact of the *volume up* button. Open the back compartment and close it paying carful attention not to hinder the buttons.

I discovered these little details after I gave away my Samsung phone because I could not boot into recovery. The guy I gave it made about 5 attempts and it booted. It never booted in recovery on the first attempt.

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"For this reason I gave no try to the RC5 recovery."

If I were you at this point I was try it!!!

"My concluding hypothesis is that the S3s parition might simply be be to small for version 3.X TWRP recoveries, whereas S3 partitions might be large enough. "

From what I understand , you can flash, you can't boot into recovery.

If the recovery partition was small as you suggest , the flashing wouldn't complete or it would complete with error.