How do you block numbers on a sony erricson phone?

I have annoying texts from this dude and he really annoys me i get it at least five times a day. I have a sony erricson Z610I and i was wondering how you block numbers like you do on MSNHow do you block numbers on a sony erricson phone?
If these calls are classed as harassment then your network provider will be able to change your number free of charge and can usually be done within a few hours of contacting them. It's unlikely that they will/can block an individual number though I'm afraid and I'm pretty sure that you cant block them on Sony handsets.How do you block numbers on a sony erricson phone?
Hi being a sony ericsson owner my self you are unable to block no.s through the phone the only phones i know of that you can block no.s are samsungs speak to your network provider %26amp; they should be able to do it for you .. hope this helps
Go to the menu, and then settings, then go on the calls tab an select manage calls and then restrict calls.
not sure