The audits are "up" to $30 in my area, and there are still quite a few available, but it looks like they've had some takers. I haven't done the phone audit: I've done a few of the basic Mystery Shops (no reveal, no pictures) when I was in the market for a new phone. I did one at the base rate, and then two more at pretty good bonuses.
And then, when I was ready to buy a new phone, I did the buy a new phone one. That shop was very easy and I'd say it's perfect for anyone who has the service from this carrier already and was going to buy a new phone, or anyone who doesn't mind switching to the new carrier for a couple of months to complete the shop and the follow up. It paid and reimbursed a total of $175 (I waited until the shop fee was up to $125 and the "Reimbursement" never moved from $50). The shop won't pay for a smart phone (which is a required purchase), but it will contribute toward the cost of one if you were going to buy one anyway.
I'm sorry the audit was so much work for the pay, do you think another one would be less work now, since you've read the instructions and know what to do? Sometimes the first one of those shops is kind of a "loss leader" that you do at a loss in order to get other, more profitable shops in the future. Do you really think three times the rate is what it would take? About $80 or so? They're being slowly bonused in my area, I'll be interested to see how high they get.
Shopper in California's Bay Area