To top up my mobile phone I dial 453 and someone will tell you how much credit you have and then ask you to press a certain number to top up. Then you just need to either dial or tell them credit...
I'm not positive, but I think you need what they call a phone filter or a line conditioner. I have one here at the house. It's a small little box (1"x2") with a plug for a cat 5 line on one end and a...
When you are charging the phone, it will often light itself up to indicate that the charge is complete. Some phones light up as a reminder of missed text messages or phone calls.