I need to block a number number from calling /texting my pantech marauder

SOURCE: Block texts on HTC Touch Dual

yes

SOURCE: BLOCK CELL NUMBER WHO CALLS AND TEXT ON MY BLACKBERRY 8330 CURVE

You will have to block the number with your wireless provider.

SOURCE: Is there any way to block one specific number from

yeaa there is block number option in the settings

Testimonial: "Thank you very much, my neice was getting harassing txt messages and I dont live close enough to go into her phone now I can tell her what to do."

SOURCE: I need to block a certain number from calling or

you cant block anyone on any phone my advice next time he,she calls tell them if they call text again you will file a formal complaint of harrasment to the police
if you dont want to do that change your number and dont give them your new number good luck

SOURCE: i would like to block

Select Menu > Settings and Security
Then,

Call restrictions - Restrict incoming calls to and outgoing calls from your device
(network service). A barring password is required.

Closed user group - Define a group of people whom you can call and who can
call you (network service).

http://www.nokiausa.com/get-support-and-software/product-support/x3-00/guides