What does it mean when you call a cell and hear the message "subscriber can't receive messages at this time"?

I need directions on how to block a specific cell phone number from calling my cell phone.

How to trace 'private incoming cell calls' that have blocked their id

what or how do I receive a txt message I received a id code

How do I get my phone messages I get an id code but new at this

If I try and ring someones mobile phone and the voicemail says this number is not permitted to receive calls what does that m...

When a cell beeps whats this mean

How do I get the numerous multimedia messages that I received as a text on my phone?

How do I block a cell phone number from calling me on my cell phone

It's really annoying because texts look jumbled up and I got this phone yesterday. I'd just like the sent and received mmessa...

Why would someone keep calling me all the time with a private number on my cell phone???