P76920f worked for a day now has network issues again.

As soon as I updated to P76920f I could connect to a roaming tower again. but after a day it was having some other issues with voicemail and visual voice mail. So I did a factory reset and now it will not connect to a roaming tower again it gives the "SIM does not allow connection with the network" message. 5 other T-Mobile phones have no problem and putting SIM in Exhibit 4g and it works fine, and now with you try to manually select the T-Mobile net work it says the same thing. But if you just say select automatically it will connect to the T-Mobile tower. But after the reset it will not let you connect to visual voice mail either, just says "server unavailable". Tried connecting through Wi-Fi calling and just on the 2G tower and it will not go through, the Exhibit 4g had no problem. I've gone through every trouble shooting step out there I would think since I had this problem with the update before this and spent a month on the phone with T-Mobile and 3 phones and 3 SIMs before they said sorry you'll just have to wait for a update.