00 44, plus the UK number without the leading 0.
+34 (including the plus symbol) followed by the 9-digit Spanish number
Just as you would call an English landline.
To call a UK mobile from a UK landline, you always just dial the UK mobile number, exactly the same way you do when it is in the UK. The network will find the mobile automatically, and the mobile user will pay any applicable surcharges for international roaming.
To call from Spain to Gibraltar, you now must use the full international number, 00 350 followed by the Gibraltar number.
Dial the UK mobile number in full international format: replace the trunk prefix 0 with telephone country code +44 (including the plus symbol).
To block call waiting on a landline phone, you typically need to activate a specific feature through your phone service provider. You can do this by dialing a code, such as *70 in the U.S., before making a call, which temporarily disables call waiting for that call. Alternatively, you can contact your service provider to permanently disable the call waiting feature on your line. Always check your provider’s documentation for the exact steps, as they can vary.
In North America (USA, Canada, etc.), dial *67 or equivalently 1167 to block sending your Caller ID on a per-call basis. Other countries use different codes for this purpose.
You dial the normal number. The phone network will handling routeing the call to wherever in the world the mobile currently is.
You can still make domestic calls when international dialing is disabled.
+44 (for the UK), then the full mobile number without the leading zero. for example, to call 07999 999999, you would dial 0044 7999 999999
To call Spain from any GSM mobile, anywhere in the world, dial +34 and then the 9-digit Spanish number (landline or mobile).
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