Alternative for CWM/TWRP Recovery,here is Carliv Touch recovery ported to Lenovo S20.Fully touch function and mount usb storage.
Flash with SPFlashtools or install recovery with MobileUncle Tools(need root).
1)Need to install driver and software below in PC
- SPFlashTools v5.1352.01
- PdaNetA4150- https://drive.google.com/file/d/0B7l7U-0zrn4vekFaSDg5Q2ZiVFk/edit?pli=1
- MTK65xx Drivers- http://forum.xda-developers.com/attachment.php?attachmentid=2519310&d=1389864924
2)Off phone>Run SPFlashTools>Click options-options>Download>mark DA DL All with checksum>Click scatter loading>find and choose MT6569_Android_scatter.txt>Click Download
3)Off your phone>pull out battery>connect usb…….wait till the dialog OK appear
4)Pull out usb>put the battery>and reboot to recovery by pressing and hold power+vol up+vol down…after you see a boot splash,release power n vol down but keep pressing vol up repeatly until enter recovery mode.
1)Install MobileUncle on your phone- https://play.google.com/store/apps/details?id=com.mobileuncle.toolbox
2)Download and extract Carliv Touch and copy recovery.img to root of sdcard (not in any folder)
3)Run MobileUncle and give it root permission
4)Touch Recovery Update
5)Look at Recovery file in SDCard and touch recovery.img
6)When a dialog appear,just touch OK
7)Reboot into recovery mode>choose OK or cancel…and you're done
-Confirmed working by brofaez4000