When your parents were children, there were no such things as mobile phones. When people wanted to make a call, their only options were to use the phone at home or a pay phone somewhere else. With the appearance of mobile phones, though, individuals are now able to carry their own personal telephones. This has changed the way people use the phone and even the way people live. Let's look at when and how mobile phones appeared and the impact on society that this technology had
Before I start I want you will know about mobile problem
And it’s type.
This is use for lock of keypad of phone .the number of mobile is deferent for different phone.
SIM PIN CODE
This code use for lock sim whenever you using our sim in different phone it secure your account. set by your service provider default code is 0000 or 1234.if u want to change it you can.
SIM PIN CODE-2
This service use for secure some advance feature of your phone as fixed dialing. This code not support to all operator
PHONE SECURITY CODE
This code use for lock phone for using other sim .some handset required this code when incoming call. If u Wants to change it you can.
NETWORK PIN /CALL BARRING
This code use for barring different call .which is depending your operator.
PUK (PIN UNBLOCK CODE)
if u press any wrong key or you forget you pin code or you enter wrong number 3 times so your sim will be lock .for these release you need puk code which provide by your operator.
Some other utility for you just wait few days