Xfinity Mobile Promos don't apply to the first month?

XM Promo billing credits always start on the second billing month, and usually they explain this in the small print, but didn’t for this promotion. This makes sure that you get a bill credit for a full month of your lowest unlimited data tier, not a partial month credit if you were an existing customer who added two line in the middle of the month. You should get 12 full month credits as long as you maintain the 2 new unlimited lines. 

Ends 6/21/24. Restrictions apply. Not available in all areas. Internet subscription req’d to be active more than 90 days. Req’s purchase of 2 new unl. data lines. Free line limited to value of one new Unlimited line, or lowest unl. data tier available for your account, via 12 monthly bill credits. Must maintain at least 2 lines on any unl. data tier. Limit one per account. May not be combined with other service offers.

So this is standard? As long as they do the 12 months for the line and 10 months for the bring your own device then I am good. 

Just I saved the terms when I signed up and it does not say this. I can see the credits on my second month already, but I kinda expected them on my first month? 

@Xfinity Support Can you confirm? My first month was billed at the full monthly amount with no proration and no credit.