Lenovo S60-a 5.0.2 STOCK

First charge the phone battery to 100% ! (seriously u can't replace the battery or charge in another way)

Known modes:
Vol+ + connect USB on turned off phone = Download Mode (Qpst, Qfill)
Vol- + connect USB on turned off phone = Diag Mode
Vol+ + Vol- + Power Button = Lenovo Recovery (there is an option to turn off phone), this is the simplest way to turn off the phone:
hold Vol- and Vol+, hold Power and wait for reset. Chose english > Turn off

Info:
I've got prepared img files for QPST flash from original S60-a_S232_151021_ROW because i can't find other than OTA update.zip. This is Eruopean ROM Version for Lenovo S60.

Version info:
Lenovo S60-a Stock ROM 5.0.2
S60-a_S232_151021_ROW

Updated from version:

S60-a_S227_150806_ROW
S60-a_S223_150716_ROW
S60-a_USR_S223_1507161740_Q2040.1_ROW
S60-a_S212_150504_ROW

Warning:
This ROM will wipe all userdata! Except external SD Card.
If phone after flash won't boot up and only long vibrating long hold: VOL- and POWER BUTTON (30-120seconds). Phone should restart.It happens when you will flash from other versions loader (for example 5.0.2 -> 4.4.4 or 4.4.4 -> 5.0.2). Why? Because old loaders is running and you have flashed the new one so you have to restart the phone but u can't remove the battery and u have to long press PWR Button.

Warning 1:
If something went wrong and phone is long vibrating and windows see Qualcom MMC (a lot of drives) u can repair it by flashing emmc with MiFlash and then HOLd VOL- and power Button and plugin USB Cable.
(alternative u can flash manually with: EMMCRAW_1.4.0.0.exe, firstly load partition table gpt_main0.bin)

Warning 2:
After flash you should make factory reset. Turn off the phone, hold VOL- and push power button. Choose Factory reset (it wipe all userdata except external sdcard) and press start.

This is not necessery.

Warning 3:
First boot after flash will take up about 10 minutes. It has to prepare /data partition. Seriously not an hour but long time.

After 1hour hang u can hold VOL- and hold POWER button in the same time for 30-120seconds. Phone will reset in recovery mode. Then choose factory reset, afer factory reset phone will Power Off. Disconnect USB, phone should have black screen. Hold VOL+ and connect USB again. Phone will connect in Download Mode QDload flash it again with QFIL.

You should first backup QCN (imei etc.)! How to:

1. Download and install QPST 2.7.422 with QFIL and Qualcomm USB Drivers and LenovoUsbDriver-1.0.12.
2. Turn off the phone. Hold Vol- button and plug-in USB Cable. (VOL- and Power Button runs something like recovery menu)
3. There should be devices in device manager: Ports COM called:
   Lenovo HS-USB Diagnostics (COMXX)
   and
   Lenovo HS-USB NMEA (COMXX)
   If there is no devices u have to install it manually in device manager.
4. Choose backup MRD data (first put SD card inside)
5. Run QFIL, check is there a correct diagnostic port COM. On the top click: Tools > QCN Backup Restore
6. Choose path with write permission, click Backup QCN
   

How to flash:

Charge the phone 100% and make QCN backup! Then do the factory reset.

1. Download and install QPST 2.7.422 with QFIL and Qualcomm USB Drivers.
2. Turn off the phone. Hold Vol+ button and plug-in USB Cable. Phone will vibrate one time, screen wil be black. This is DownloadMode.
3. There should be device called in device management:
   Qualcomm HS-USB QDLoader 9008 (COMXX)
   In any other case u have to install drivers manually.
4. Run QFIL.
   Click Browse… in Programmer Path and choose prog_emmc_firehose_8916.mbn
   Load XML in Download Section:
       First select RawProgram File: rawprogram0.xml
       then Select Patch File: patch0.xml
5. Check all inputs is correct and click Download under Load XML button and wait about 5 to 10 minutes:
   
    

In emergency cases:
How to reset phone from QDLOader Mode: hold power button for 30-120 seconds
other possibility: hold vol- and vol+ and pwr button (all buttons) for some time
or try hold any button and connect USB.
Another emergency: Hold VOL- and Power Button and plug in usb cable.

Warning!!! Info about chineese version Lenovo S60-w

I have sucessfully flashed this images 5.0.2 on my china S60-w version. After that phone is visible everywhere as S60-a.
System OTA update works.

You shouldn't flash back to 4.4.4 (different loaders). You can do it but sometimes u have to do reset the phone (long hold power button for 1 minute) after reflash.

But im not reposnibility of any fails, do it for you own. There is stock 4.4.4 ROM for chineese version S60-w if something went wrong: http://www.needrom.com/download/lenovo-s60-w-stock-rom/ and S60-a stock 4.4.4: http://www.needrom.com/download/lenovo-s60-a-4-4-4-stock/