Just got my G3 yesterday and i love it compare to M8. Yes, i did notice the lag and its very annoying. I snooped around XDA forum and found a fix that takes the lag off without a Root. I did this and my G3 is snappier than my ex M8.
Try it at your own risk...i hope it works for you because it worked for me.
If you are experiencing some of annoying LAG on your G3,here is how to get LAG away (works with my G3) :
1. Enter the following based on your device model:
3845#*855# (for International model)
3845#*851# (for T-Mobile)
3845#*850# (fot AT&T)
5689#*990# - LG Hidden Service Menu Thanks to @ericdabbsSPRINT G3
Dial: ##228378 + send, LG Hidden Service Menu (Reduced) ... Thanks to @asialove2013*VERIZON G3
!!! Verizon- don't know,because when you enter model number of these two carriers nothing happens. Someone could check this out and tell me !!!
2. Scroll down to High Temperature Property OFF,and select
3. Turn it ON...
4. Turn G3 fully off...
5. Wait at least 10sec...
6. Turn it back on and wait about 30sec. when Screen Lock shows...
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