
If you own an iphone than you can download it from App Store, for all phone users, they can access it by visiting to http://m.sc.com/pk.
By all means this is not a mobile banking, which other banks like Faysal Bank, MCB are offering in Pakistan. In which your mobile banking account is separate from internet banking & it requires customer to call help line to activate it. But this is different, you just need to download the app & login with your internet banking account credentials.
There is not much information on how secure this mobile app is. I think we should leave it for time to decide. For now if you are SCB Pakistan internet banking user, you should definitely give it a try.
For more info: Breeze Mobile