I double checked today to confirm that MCI gives 7 miles instead of the usual 5 miles to your SkyMiles account for every dollar spent if choose to automatically bill your American Express Optima card. It does not have to be The Delta SkyMiles Optima. (You might get different answers if the CSR you speak to doesn't "research" the issue).

With the Gold Delta Sky Miles Optima, you can receive double miles with all purchases until the end of June.
So essentially, on a $100 MCI phone bill, you could walk away with 900 Skymiles! ((100 x 7) + (100 x 2))

Also, once you choose this option, you get a "special" customer service number. Apparently, only certain csr's have access to the credit card information. The new customer service number is 800-444-1004. They also send out new cards bearing the AMEX logo on it, though your enrollment in the FF partner is unaffected.
Hope you can use this.

To set up the billing method, call MCI Premiere Financial Services at 800-756-9713.

MCI Delta Partnership questions 800-754-7076.

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g'day
wl

[This message has been edited by wanderlust (edited 05-20-99).]