Hi guys.I`ve got an Samsung S5+ with a odd problem, maybe for me.I cannot do OTA update because some root i think.The guy that i took the phone, he said that there is no root.But yet again i cannot check for update because of an error.Device status is custom.So i think that is rooted.So the system is from Singapore i think.Software 4.4.4.And i would like to update it to Lollipop and to keep it stock.Baseband is : G901FXXU1ANH5 . Any ways to change it, update it to Lollipop and then unroot it back?It`s for my girlfriend and i want to make her kinda happy and not to miss her S4.