How can tell if someones phone is on ROAMING, eg if they have gone to spain and you dont know it?

Question

How can tell if someones phone is on ROAMING, eg if they have gone to spain and you dont know it?

Answer 1

the ring tone will be high pitched and about 1 second further apart

Answer 2

If you are calling from the UK then the ringing out tone will be different from the ringing out tone to a mobile in the UK, normally for Spain/Portugal and Canada its a longer tone before a gap and then another ring tone, the same as ringing abroad from a land line.

Answer 3

Duh, the ringtone changes! the "toot-toot" you hear will sound different.