uk area code issue
I am trying to complete the “Apple trade in form” and it is not letting me proceed without an “area code” i am in the UK and have used every possible way of writing 0798XXXXXXX tried +44798XXX and even tried +440798XXX.. i live in Maidenhead so even tried 01628 and +441628 and none are working! Why is such a simple thing so difficult..? The location is clearly showing UK so really don’t know how to get past this to submit my form.. any help or suggestions will be appreciated! Thanks
iPhone 12 Pro Max, iOS 17