I have a 13 Pro Max on Verizon and my 5G/LTE becomes completely unusable during random times throughout the day, to the point I can’t even run a speed test, or even send a text or iMessage. It will just say sending for 15+ minutes. Turning airplane mode on and off fixes it for a minute but it always slows back down again.
Is it just because I’m on Verizon’s “unlimited” plan? It’s 50Gb of “premium” high speed data, and I use around 50Gb every three months or so, so the limit isn’t an issue. The data plan description says it will be slower during high capacity times, which could be completely randomly and I would have no way of knowing.
I’m right outside a major US city most of the time so I’m not in a remote location.