[Q] Sm-n9100 duos Sim 2 no service topic

Hey guys. I just bought the sm-n9100 duos and i am having the issue that the sim 2 is losing signal after 5 seconds that phone is turned on and shows no service even if i am in a full coverage area. I understand that this sim works only in 2G. It is weird that sometimes I have signal in some specific places but the majority of time not. Does anybody have the same issue?

[Q] Install firmware in Sm-n9100 with LTE band 4 compatible topic

Hi guys. I'm currently using my phone where the LTE company is in band 4 my phone shows other bands 3, 17, etc. Is any way to install a stock ROM via Odin compatible with LTE band 4. I've read that the n910F has this band in its firmware. Does anybody tried installing in sm n9100. Will the dual sim feature affect if we flash with the n910f rom? thanks