Unhappy [Q] Signal Issues on weak signal spots cellular problem non wifi related

loved my g2 but i think it has weaker signal on low signal areas. i made a comparison with my iphone 5s same sim network, iphone 5s has at least 2 or 1 dot of signal and never drops but my lg g2 always show an x on the signal bars. anyone experienced this? any solution or maybe its a hardware problem?