I am planning to be in Scotland (mostly Edinburgh, with a couple of day trips elsewhere) for the last week of this month. I have already learned a great deal from this forum and will no doubt be pelting you all with questions in the next couple of weeks.
Here's the first one: In preparation for my trip, I bought an unlocked dual-SIM phone and ordered a Giffgaff SIM card for local calls and internet access in the UK. I set up my Giffgaff account and got my UK phone number, though it won't be active until I arrive in Edinburgh and activate the SIM.
I would like to make a few restaurant reservations in advance, while still in the US, and I am unsure which mobile number to give as a contact--my US number or my UK number?