Every week a Guardian Money reader submits a question, and it's up to you to help him or her out – a selection of the best answers will appear in next Saturday's paper.
This week's question
I was about to buy a new SatNav when my boyfriend suggested I use a smartphone one instead. I need to change my phone, so that's fine. But which phone, and which satnav? Do they really work as well? Can I use it abroad without running up huge roaming bills?
What are your thoughts?
