Sir Dobi, My mom is on plan 1799 and has the iphone 4s for around 2 years or more now IIRC. I dont have a postpaid plan so she gave me her micro sim but kept the phone. My question is, can I use this sim card to an LTE enabled device or do I have to upgrade the sim card first? If so, can I just walk in to a globe service center and ask for a sim upgrade even though it's under my mom's name? She's in Mindanao right now and im in manila so i can't really ask her to do this for me. And is she already a candidate for a retention reward i.e. get a new phone for less?