Also failing here in the Los Angeles area. Used to be on Sprint before the acquisition. Probably location dependent
replyI got the failure message in San Francisco.
replyNot sure if it makes a difference, but I had a T-Mobile SIM card I bought in Seattle in 2010 and was carrying from phone to phone for years, but I recently replaced the SIM because I heard newer t-mobile SIMs can do better finding 5g coverage.