Pay as you go mobile phones mean that there is no contract or monthly bill. No connection fee and no hassle. With pay as you go mobile phones, 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.
Pay as you go phones can display your call credit so that you can keep an eye on how much credit you have. Pay as you go mobile phones also offer the sms service, so even if you are unable to talk you can still keep in touch. Even if you don't use up all your credit on your pay as you go mobile phone you won't lose it, it will just be added to any top ups that you make.
Many pay as you go mobiles offer varying amounts of call credit when you purchase a new phone.