I need to block 1-800 phone nubers from calling

Call blocking is usually a function of the service provider, ie Verizon, T-Mobile, AT&T. Check with the service provider to figure out what blocking capabilities your plan allows. Also--if you know it's a crank call, don't listen to the message. Just delete it.

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Hi
PUK code is called as PERSONNAL UNBLOCKING KEY.
Your phone will ask for PUK code when you entered the PIN code wrongly several times depending upon the mobile make. The mobile asks for PUK code so that unauthorized persons do not use your mobile for wrong cause.
To get PUK code please contact your service provider through phone or go directly to their office. They will provide you the PUK code for your mobile. The PUK code for mobile phone.so that you can open your phone. When you planning to call your service provider you cannot use your mobile as it is fully locked. Please use some other mobile with same network to call your service provider.
While you get the PUK code ,the service provider customer care officer will ask for your personal details to check whether the mobile belongs to you only. If they are satisfied with your answers they will provide with the PUK code
DONOT enter the PUK code several times wrongly,It will block your sim card permanently.
This PUK code is FREE. You no need to pay any sum to get the PUK code
Thank You.

There are many apps in Play Store can block calls. I think LEO Privacy is a good choice.

I would block the number all together. Your phone may provide some built in options such as filtering based on the Caller ID. For example, some Nextel phones allow you to block Private Callers. You should check your phone's owner manual for these options or find an online cell forum that has a group for your phone.
If you have a Smartphone, you may have more options. You may be able to install third party programs that can block calls. Usually, these options are reserved for Palm OS and Windows Mobile phones. Some examples include MagiCall, which works on Windows Mobile and CallShield Pro, which works on Palm OS devices. The feature set can also differ based on your carrier because of differences in the network.

with imei nuber we cant porovide code just unlock with mx key

Hi
PUK code is called as PERSONNAL UNBLOCKING KEY.
Your phone will ask for PUK code when you entered the PIN code wrongly several times depending upon the mobile make. The mobile asks for PUK code so that unauthorized persons do not use your mobile for wrong cause.
To get PUK code please contact your service provider through phone or go directly to their office. They will provide you the PUK code for your mobile. The PUK code for mobile phone.so that you can open your phone. When you planning to call your service provider you cannot use your mobile as it is fully locked. Please use some other mobile with same network to call your service provider.
While you get the PUK code ,the service provider customer care officer will ask for your personal details to check whether the mobile belongs to you only. If they are satisfied with your answers they will provide with the PUK code
DONOT enter the PUK code several times wrongly,It will block your sim card permanently.
This PUK code is FREE. You no need to pay any sum to get the PUK code
Thank You.

HI If you are asking for pin contact your service provider , he will give you a default pin . If you try pin more than few predefined no of times your phone will ask PUK code which can also be given only by your service provider which is specific for each and every mobile number . Donot try PUK code many times or else your sim will be blocked and you will need a new sim.
Contact your sim customer care department over phone. Its free of cost to get the pin or puk no.
Go to the nearest service outlet of your service provider they can also help you.
There is no other go than the above procedure only your service provider can give it nobody else in this world nor any software.

Usually private calls made are from a phone card so basically you cannot return the call. Hope this helps

Only the sim is blocked, not the phone. The unblocking code is located on the sim casing when you bought it. It will ask you to enter the code and new PIN code 2 times but will completely block it if the limited number of attempts is reached. You can just simply replace the sim and the phone will work again normally.

the phone is the ke800 and no, i dont know why the screen doesnt work. i did read how others have the same problem. one day it worked the next nothing..dont have money for the plan..but these phones are too expensive to just up and quit on you..thank you