Hello, i'm trying to remove the server connection whitelist by completing the identification procedure by sending an SMS. (As instructed under php settings in the control panel.) However I just can't text this number and keep receiving "not delivered" messages.
I am using the United Kingdom based mobile network Vodafone and have correctly formatted the number with 00 in front of it in order to make an international SMS. Furthermore I have contacted Vodafone directly and confirmed my ability to make international texts. Their technical advisers concluded the issue must be Altervista's side.
So i'm left a little stuck , and would be grateful for any help or an alternative identification procedure.