No GSM Service on LS990 lollipop roms topic

Help. I have an unlocked ls990, I am with MetroPCS and I have a metropcs sim card in the phone. On every single rom I've tried I cannot get any service at all. All of them say "no sim card detected" and when I look in the settings, it says I'm connected to Sprint. I get a "1x signal" and cannot make any calls ot texts. I can't seem to find any info anywhere about my problem

I first tried the *#*#DATA#*#* and tried to switch to LTE/GSM it said "searching for service" for a second but it just reset itself back to LTE/CDMA (PRL)

I then tried to look for APN settings. There was no option to select it. It wasn't even in the menu.

Does anyone else have this problem? Is there a fix?