i have lg rumor 2 with virgin and got the same 2 messages today..what does it mean? i texted back but it said the text had failed

I received this message today, also in two parts. Somethin weird is that I thought the numbers wit 555 didn't exist... but I received q message from it. I'm using the LG Rumor with virgin mobile. By chance every text message received with Virgin are Free!

I'm in the 780 area code and I've just received the same two messages. Both received at 16:15 on my BlackBerry and both from (416) 555-2121.

1st:
//WDAAMAXRABXwLoABABChCK6AAyiCgQEBwMIIQUHKNDo6OB0Xl7a8uDSxujq5MrmXMTK2NhcxsJeXubQwuTKmsrm5sLOylzI3n7S3OzS6Mp63Iq05GjelJxqqqBgtG6e1tDCltYAA0Q

2nd:
//WDAAMAXRABIQD4ABAIACAEKCgag0sZerNLIWprK5ubCzspAAAwGABYCA==

I thought it might be a script of some sort to triger information send back. I have a firewall on my BlackBerry and if this continues I'm going to enable it and see if it will block these texts. Also, if enough people call their providers, a 'harrasement investigation' is conducted between your provider and your local police. I've done it before.

I have recieved over 12 of these random textular messages.waird rite? I own a Lg Rumor and im with Virgin Mobile.

i have lg rumor 2 with virgin and got the same 2 messages today..
what does it mean? i texted back but it said the text had failed