[tooski]

My understanding is that all cell phone technologies use radio waves. So, a cell tower will handle talk, text and data. My wife has talk, text, data; including long distance service. I only have talk (no long distance) & text to avoid the cost of data on my phone.
Presently we are in the US (from Canada). She cannot receive a phone call. She can make a call but it will take two or more tries. We can see the roaming network changing on her phone. However, there is no problem sending texts or using the data to surf the web.
My phone has no problem sending or receiving phone calls. Roaming network is steady.
What gives?