International Day Pass Charge Cap

$120 for one line, plus $60 for the second line, per billing period.

Theoretically $180 per bill cycle.

Possibly $240 per bill cycle

If you travel abroad for an entire bill cycle. Line A uses his phone every day for the first 10 days. Line B does not use their phone.

days 11 through 20 line B uses their phone every day for 10 days.  Line A has capped out, no charges

Each line will occur $120 in charges 

To be clear, it depends whether both phones use IDP on the same day or not.

When more than 1 line on your account is charged a daily fee on the same calendar date, 1 line will be charged a $12 daily fee and each additional line will be charged a reduced daily fee of $6.

that is insanely high

Compared to the cost of flights abroad and accommodations in hotels, it's nothing.

You can always pay off your phone, unlock it, and purchase local service

What is the point of this international pass? That is insanely high

Have you looked at the international pay-per-use charge to compare?

$2/ min for talk in Europe.  $2.05 per MB (not GB)of data.  People have gotten bills of $800 to over $1000 while traveling outside of the U.S.  But don’t believe us.  Go on your trip, decline the IDP, and see what your bill is.

There's an article that's been circulating because a T-Mobile customer traveled without a travel plan, or on the wrong postpaid plan and got $143,000 bill for roaming services.

I have seen people complain about receiving bills anywhere between a few hundred dollars to a few thousand dollars, on this community forum.