Firmware.

2 hours on hold with 611 wrote:

@Pistoli Is your sim cover:  hard plastic or soft rubber ?

My two units that lost 5g after 100.18 had hard plastic cover,  my most recent has soft rubber & had no issue with the update 

I just had my Wife check and she said it was Rubber.  I am going to head in to the store tonight to swap it out, I will try the sim swap first to see if I can get 5G on my phone.