You can make an outgoing roaming call at this special flat rate through callback service by dialing *145*00(CountryCode)(PhoneNumber)# and then pressing the call button.
You can also use either “+” or “00”
e.g. If you are roaming in the UK, dial *145*009715XXXXXXXX# (to call an e& number) or *145*0096611YYYYYYY# (to call a landline in KSA– Riyadh).