I have only had my Curve for a few days. I set it up on my home network mostly because I want faster data services. I have plenty of minutes and good T-Mobile coverage in my home - don't need WiFi calling.
This evening... it appears several calls and an SMS never made it to my phone. When I turned off the WiFi, calling in worked and the SMS messages came in (they were queued).
Does this mean I have to leave WiFi OFF unless I really need faster data?? (and then plan to lose calls and SMS)