My UNLOCKED S-9 can not transmit to the cell site if Band 41 is weak either. It supposedly has HPUE but I do not see any improvement over phones without HPUE. To make it wore, recently the parameters have changed that allow me to hang onto Band 41 and band 25 with a signal of -130. Nothing works at the level, but apparently somebody decided to keep me on extremely poor connections and not allow the phone to drop to a better band. It probably was done in preparation for VOLTE, but it sure has killed my data experience. If I am trying to download an attachment to a G-Mail message, I can not do it on band 41 when being held to very bad levels. -120 was not working and now I find my phone hanging onto -130 level.
Does anyone here have an issue with Band 41 not working well (or at all) on their S10 series device at signal levels of -104 dBmv or worse? It's like the phone can't reach the tower to send requests. I never had this issue with my Note 8 and it worked well up to around -120 dBmv.
I can't help but wonder if my launch-day S10+ is defective.