After setting up your new number, it is a good idea to test it to make sure it routes as you need.
When you are forwarding your number to an outside cell phone, do not place your test call from that cell phone number, as it will cause a loop.
Instead, place your test call from a different number (landline, friend's cell phone, etc.)
Why am I prompted to enter a password when I test my call forwarding?
This is the result of calling your NumberBarn number from the phone or device you are forwarding your number to. Essentially, it's the same as dialing your mobile phone number from the same mobile phone. Your mobile phone thinks you are trying to check your voicemail and asks you for your password for that device.
This is why you will want to test call forwarding from another number different than the one you are forwarding to.