This is more so a T-Mobile problem. I've used T-Mobile a handful of times with my Samsung phones and every time without fail there would be big problems. T-Mobile was pushing out updates and I would never receive them even after waiting patiently for months. Recently, they told me to change my Sprint SIM card to a T-Mobile SIM that was apparently "faster" and "offered greater coverage" but all I ended up getting was a message on my phone telling me that my device was carrier locked even though it's been paid off for over a year and previously worked fine with any carrier. So yes, if you are a Samsung user, I would highly recommend you stay clear of T-Mobile and their awful services. Honestly, I've never been more disappointed in a carrier than this. Also, now that I am on Verizon, I get far better coverage and my updates come on time. I don't miss any texts, and my phone doesn't try to carrier lock itself. Verizon and AT&T are leaps and bounds above T-Mobile for Samsung users. ... View more

Solved UICC Issue In late September, My phone updated. Then this annoying popup started. T-Mobile finally admitted their system upgrade for 5G was the issue and I should get a 5G phone. Not! Their upgrade is incompatible with Samsung''s SIM authentication. This is collusion for sales. Then on Election Day, T-Mobile starts another upgrade. I couldn't send texts for 36 hours on top of popup. Solution: New SIM New Carrier Same Phone S8Plus No Problem ... View more

Solved UICC Issue In late September, My phone updated. Then this annoying popup started. T-Mobile finally admitted their system upgrade for 5G was the issue and I should get a 5G phone. Not! Their upgrade is incompatible with Samsung''s SIM authentication. This is collusion for sales. Then on Election Day, T-Mobile starts another upgrade. I couldn't send texts for 36 hours on top of popup. Solution: New SIM New Carrier Same Phone S8Plus No Problem ... View more