What did you think was a mistake about the mobile shared plan? I just switched to that for my single device and I was enjoying the money saved. Am I missing a "gotcha"?
* I previously had a 23% discount (FAN code) on my account which applied to the unlimited data lines in a favorable way. In essence, it applied to both the $30/month data fee for Unlimited, and the couple hundred minutes of call and unlimited text family plan which were sort of an umbrella for all the lines. With mobile shared, one of the gotchas I didn't discover until well after the first bill (since the perpetual excuse with a FAN code discount is – it takes a while to apply) was that the discount applies only to the mobile shared data bucket charge, not to the $30/phone, $x/tablet, $x/modem device access charge line items which quickly add up if you have more than a single line. This really threw off the math I had done for affordability and made it more expensive for me.
* The tiers previously were structured a bit differently, and with the two lines I had plus another person, I would always hit the 10 GB I had signed up for, then pay the $15/GB overage. Going to the next tier up to avoid paying overage for a GB or two would've still been more expensive, so like clockwork I would always end up paying some overages. Since then they've doubled some of the larger tiers as a reactionary measure.
Affordability wise quite honestly AT&T is close to parity with T-Mobile if you manage to get the mobile shared value plans which have cheaper monthly rates if you bring your own device or buy without a contract.
Some people don't realize that the real cheap rates are because you are giving up a subsidy, and that your next new phone will raise the rates again. OTOH I personally think that's a benefit since I can choose to get the subsidy or Next or just buy the phone outright.
* I previously had a 23% discount (FAN code) on my account which applied to the unlimited data lines in a favorable way. In essence, it applied to both the $30/month data fee for Unlimited, and the couple hundred minutes of call and unlimited text family plan which were sort of an umbrella for all the lines. With mobile shared, one of the gotchas I didn't discover until well after the first bill (since the perpetual excuse with a FAN code discount is – it takes a while to apply) was that the discount applies only to the mobile shared data bucket charge, not to the $30/phone, $x/tablet, $x/modem device access charge line items which quickly add up if you have more than a single line. This really threw off the math I had done for affordability and made it more expensive for me.
* The tiers previously were structured a bit differently, and with the two lines I had plus another person, I would always hit the 10 GB I had signed up for, then pay the $15/GB overage. Going to the next tier up to avoid paying overage for a GB or two would've still been more expensive, so like clockwork I would always end up paying some overages. Since then they've doubled some of the larger tiers as a reactionary measure.
Affordability wise quite honestly AT&T is close to parity with T-Mobile if you manage to get the mobile shared value plans which have cheaper monthly rates if you bring your own device or buy without a contract.