I rooted mine twice
1st:
with stock ROM using root_4.3.apk here:
https://www.dropbox.com/s/55chk7rp0idva1t/root_4.3.apk?dl=0
And supersu.apk on google playstore
For super user-root_4.3.apk is in Chinese(?)
2nd:
(ROM: cm-10.0.0.l0.BobZhome.05212013.zip)
Using towelroot.apk (1st root app didn't work after flashed)
PS: used 2nd-init recovery for bobzhome
aflick3:
Edit: there is lollipop for lg ms770
But you'll have to root then install 2nd-init recovery app...etc (sadly the lollipop update reguires a survey to download - otherwise I'd be using it instead of bobzhome )
Edit 2: The new rom wont be automaticaly rooted-you wont have to unroot to flash one but youll have to reroot once flashed
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edit 3: (didnt want to post under my post this edit is totaly new question)
is it possible to flash a non android OS to an android phone?
particuraly a desktop OS to LG Motion 4G (im thinking it would have to be a linux distro unless entire phone was somehow formatted to ntfs or something)
if not motion 4g than any android phone
and if not a desktop OS than with non android mobile OS?