Bună!
DA, dacă faci root PIERZI garanţia!
Chiar dacă faci unroot, cei din Service îşi vor da seama.
Poţi face root cu metoda de la linkul :
http://ready2root.com/info/optimus-L7
http://forum.xda-developers.com/showthread.php?t=1906133
http://www.youtube.com/watch?v=bZQKI-xjeXI
http://www.modaco.com/topic/355685-how-to-root-your-lg-optimus-l7/
http://www.lg-phones.org/how-to-root-lg-optimus-l7.html
http://www.teamandroid.com/......-firmware/
http://www.techclap.com/10066/root-lg-optimus-l7-p700-tutorial/
Toate cele bune.