Tarcfone gave 150 days of service for $20 card. Why?
I had 5 Tarcfones in a row that gave me 150 days of service at activation. The phones are the $9 LG 329G and I added the $20 airtime card. I got them at Walmart for $8 and change. Now I bought one the other day, and this time it gave me 90 days. Has anyone else had this happen and ended up with 150 days? I would love to know what to look for to be able to get the 150 days every time. It is defiantly not the airtime cards because I got some of them at Walmart and some at Dollar General. I could't see any difference between the boxes but I wasn't really looking either. | 
