Translation of Handynummer

Thanks for the message. I hope that your friend here in England will soon be feeling better. If you decide to come at another time, I would be very pleased to meet you here. You can sleep at my place.
Maybe we would need to say install our dictionary as a software? But I would say instead of install, use our dictionary as a software. So bottom line. If I use the singular form for newsletters and websites, I am on the safe side for both?
When I was in Austria, I went to ski school for a week in Kitzbuehel. Do you know this place? It's not far away from Munich. We always fly to Munich, with a stopover at Frankfurt airport.