1. Backup your data and backuprestore.apk.
2. Download brush pack (A850 MIUI V6.1.20_4.2.zip) and save to SD Card:
3.Download Lenovo A850I recovery (CN language) And A850 recovery (EN language):
4. Download Android 4.2.2 Gapps – Jelly Bean lite
Todo:
1. Flash rom Lenovo A850 s203
2. Reinstall Framaroot, unroot and reroot.
3. Install Unclemobile, install A850 recovery for read info, and then install A850I to flash brush pack.
4. Boot to recovery mode, install A850 MIUI V6.1.20_4.2.zip and install gapps-jb-20130301-lite2for 4.2.2.zip.
+ Wipe data / factory reset.
+ Wipe cache partition.
+ wipe Dalvik cach.
5. Reboot
6. Root with iroot (www.iroot.com)
7. Install root explorer, open root explorer, go to “etc”, delete “hosts” file to eccess google.com
All done, bắt đầu vọc.
More brush pack visit:
https://translate.googleusercontent.com/translate_c?depth=2&nv=1&rurl=translate.google.com&sl=auto&tl=en&u=http://m.romjd.com/device/lenovo-a850