I made a mistake by trying to update the PRL using the Verizon dialer code *228. Now, my PRL version is 54182 and I'm unable to connect to 4G service when orignally I had good reception. Is there a way to get back to the original Xfinity PRL? I tried to manually retrieve the PRL by turning off my phone, removing the SIM card, powering on the phone, turning off the phone again, and inserting the SIM card. Unfortunately, that workaround didn't work.
So, I put the sim card into another phone and noticed that the PRL version was the same. It looks like the original PRL on the sim card was overwritten. I thought the PRL was stored on the phone itself but I guess I'm wrong.