Years ago my pilgrim friend and I checked our cell phones at home and got a perfect connection there. In Spain it didn't work. Everey time I tried to phone him I got a Spaniard on the line who got angrier and angrier. I didn't understand what was wrong. We had to communicate via his wife in Holland. Later I learned that I should have adjusted something at home before crossing the border but I still don't know what that is. Anyone? Thank you!
So dialing with your Dutch "mobieltje" to a Spanish phonenumber use the countrycode of Spain 0034, followed by the phonenumber. Take care if you do, keep away the 0 (zero) of a regio's code. *
If you do not do so , your Dutch "mobieltje" which is programmed to dial a Dutch phonenumber 0031 as being the national countrycode of the Netherlands, will dial the same number but connects it with the same local number in the country you are at that moment.
That's why, as a retired international salesman,I allways have put in all my phonenumbers with their countrycodes in my phone's addressbook. No mistakes though !
*)
So if you convert your Den Haag code ( 070 ) it becomes 003170 and the local number f.ex. 1234567. Better converting the number is starting with a + (plus). Than the countrycode, than the region code and local number. So +31 70 1234567. In some countries the 00 does not exist so better to program your "mobieltje "with + 31 for NL and +34 for Spain etc. If you travel abroad a lot of course
Bom caminho