if you going back from 5.1.1 (5.10.8) to any of 5.0.2 (including stable) you need to use MiFlash to flash old radio file to your phone. I think radio/baseband has been updated with 5.1.1.
Follow this:
http://en.miui.com/thread-166934-1-1.html
ehhh,
you need to thick that square on celogeek if you are not a robot... And download will start. I've just checked it and it works
below is link for leo 5.9.17 from androidfilehost
you're trying to download 5.9.24 which is not available yet
https://www.androidfilehost.com/?fid=24052804347818222
I'm using one since it's been announced here and can't complain about it. Working nice, good battery, no probs at all - well, haven't found any so far.
Tried it after THIS stunning review.
Thanks @BoardDWorld
you need leo file for mi note pro, not hermes. 5.9.24 for leo is postponed ATM.
You can flash correct image using MiRecovery (which is already in your phone I guess), you don't need to use fastboot or twrp.
no, Mi Note Pro TWRP version 2.8.6.0 doesn't backup modem. Logs are only showing misc, boot, cache, system, data, recovery and usbdisc. Nothing about modem...