When dealing with any phones, especially imported ones, don't rely on general names LG G2, S5, note 4 etc. Always consider its exact model number.
Like G2 has several variants.
LG G2 D800 for AT&T
LG G2 D802 for Europe
LG G2 D802TA for Australia
LG G2 D803 for Canada
LG G2 VS980 for Verizon
LG G2 LS980 for Sprint
LG G2 F320 for Korea (with removable battery and microsd slot).
They are all G2, but there are frequency and specs differences that many people ignore and then pay for it.