I rooted my LENOVO A7-3500H, with 4.2.2. with "root genius" easy. But after that i checked my tablet with avast antivirus say it virus inside my device from rootgenius so i was first deinstall few bloatwares and some unnecesary files,so then i unrooted my device also with rootgenius(it have option inside). Unrooted my lenovo A7-3500H get on first test in antutu benchmark 18.284 points, after root now is 19.444.Now works more fast and stable.So guys, i recommend if u wanna root A7 3500 H/HV (i think its already same process bcz not much different only have have call) use root genius,root it,(very easy),remove bloatwares,unroot it easy and remove virus from tablet and get more faster and stabile device. I Tested 15 days so not have any problems. BTW,i think 4.2.2. is more optimized from 4.4.2 for this device,i was few days also on upgraded 4.4.2, but i was not satisfied.backing to 4.2.2. with SP flashtool.... now all is ok. Best regards...and good luck