2-year cost for individual with 16GB iPhone, from cheapest to most expensive (without taxes and regulation fees).
- Absolute cheapest: GoPhone 250 minutes (unlimited text, no data): $1250
- Cheapest with unlimited text and some data: GoPhone 500 minutes (unlimited text, 200MB): $1610
- Cheapest with unlimited mobile to mobile voice: Individual 450 minutes (unlimited mobile to mobile voice, no text, 300MB): $1676
- Cheapest with unlimited voice and text: MobileShare 300MB (unlimited voice and text): $1880
- Cheapest with 1GB+ data: GoPhone unlimited (unlimited voice and text, 2GB): $2090
- Individual 450 minutes (unlimited mobile to mobile voice, unlimited text, 300MB): $2156
- MobileShare 1GB (unlimited voice and text): $3592
- MobileShare 2GB (unlimited voice and text): $2276
- Individual 450 minutes (unlimited mobile to mobile voice, unlimited text, 3GB): $2396
And with 2-lines:
- Absolute cheapest: GoPhone 250 minutes (unlimited text, no data): $2500
- Cheapest with unlimited voice and text, and some data: MobileShare 300MB (unlimited voice and text, 300MB shared): $2632
- Family 550 minutes (unlimited mobile to mobile voice, no text, 300MB): $2872
- GoPhone 500 minutes (unlimited text, 200MB): $3220
- Individual 450 minutes (unlimited mobile to mobile voice, unlimited text, 300MB): $3592
- Cheapest with 1GB+ data: MobileShare 1GB (unlimited voice and text, 1GB shared): $3592
- MobileShare 2GB (unlimited voice and text, 2GB shared): $3832
- Individual 450 minutes (unlimited mobile to mobile voice, unlimited text, 3GB): $4072
- GoPhone unlimited (unlimited voice and text, 2GB): $4180
tl;dr: Depending on your priorities, MobileShare plans could be the best plan (if you must stay with AT&T). FAN discounts typically favor Individual plans, so your bang for the buck isn't quite clear cut. It is unfortunate that AT&T forces its customers to do this silly dance to get best bang for the buck.