"Tell me about a problem that you have had with your phone." Does that make sense?

Your mobile phone is also a digital device.Have you ever had problems with it? For example, you couldn't make an important call because all the charge had gone.

"Digital devices" include desktop computers, laptop computers, tablets, iPads, iPods, digital cameras, mobile phones, digital watches, GPS navigation units, and many others. They are giving you a choice about what to write about. I had a problem with a digital watch a couple of weeks ago. I needed to set the time back one hour. I've lost the instruction sheet and I still haven't been able to figure out how to reset the time.