PIN PUK是什么？
下面是从网上得到的，有一点不明白，为什么PUK码忘了，或输入错误次数过了，卡就作费？


What are the PIN and PUK?

Perl code

PIN (Personal Identity Number) is a 4-8 digit access code which can be used to secure your telephone from use.PIN2 (Personal Identity Number 2) is a 4-8 digit access code which can be used to access the priority number memory and cost of calls.The PUK (Personal Unblocking Key) and PUK2 are used to unlock the PIN and PIN 2 codes respectively if your SIM card is blocked.

How do I change my PIN and PUK?

PHP code

Tired of memorizing new PIN codes? We show you how to change your SIM card's various PIN and PUK codes in less than 5 seconds.Although most people remember their primary SIM PIN code, those other codes - used for various verification purposes - are never to be found when needed. Below we've included a set of short codes which, when entered on a handset's standby screen, will let you easily change PIN and PUK (short for Pin Unlock Code) codes - but keep in mind, they may not work with all handsets and mobile operators.More importantly, when changing ones PUK codes there'll be no help to get from the mobile operator if the new codes are forgotten, so make sure to write any changes down alongside the old PUK codes. Also, please note that the codes should be entered without the spaces shown below. Change SIM Card PIN     ** 04 * old PIN * new PIN * new PIN #Change SIM Card PIN2    ** 042 * old PIN2 * new PIN2 *new PIN2 #Change SIM Card PUK     ** 05 * old PUK * new PUK * new PUK #Change SIM Card PUK2    ** 052 * old PUK2 * new PUK2 * new PUK2 #Note: These codes only work on some mobile stations offered by some providers.

[解决办法]
这就是龟腚