Phone unlocked but I can’t use a new sim card
So I got with AT&T to unlock my phone because I was being stationed overseas. They said they unlocked my phone but when I try to use a new SIM card it still tells me my phone is locked. I got with AT&T again to see what the problem was and they told me I had to go on a computer and I guess backup all my info, then wipe my phone, then download everything again from iTunes. The problem I have is I don’t currently have a computer nor do I plan on getting one anytime soon. Is there another way to go about finishing this process or am I just out of luck? My phone is an IPhone 8+.