You can do this in your address book, look for GSM codes and create one that to the number that you want. Give it a name and then just look up the name in contacts, dial it and it will be active. Create another that cancels all and you are away to go. On my old device I had a divert to office, home and many to team members mobiles. The key is to find the correct gsm code, its quicker than an app!

On Orange some older HSDPA devices show a "H" but now I think they have changed it to "3G+" with a small +. You will normaly only see the "H" or "3G+" when you send/receive data on that bearer, not in idle.