Prepay mobile phones mean that there is no contract or monthly bill. No connection fee and no hassle. With prepay mobiles you pay one up front price and buy calltime as and when you need it. You can top up your mobile when ever you like and even if your credit gets down to zero, you can still receive incoming calls.
Prepay mobiles can display your call credit so that you can keep an eye on how much credit you have. Some phones have warning sounds to let you know that you are running low on credit. Prepay mobile phones also offer the sms service, so even if you are unable to talk you can still keep in touch. The phone keypad is used to type out a message that is then sent to the phone of your choice. Even if you don't use up all your credit on your prepay mobile you won't lose it, it will just be added to any top ups that you make.
Many prepay mobiles offer varying amounts of call credit when you purchase a new phone.