call citi's customer service. there was / is another multipage thread consisting of people asking the same question and also people commenting how they got their's swapped to world elite mastercard
edit: to add here is the link http://ficoforums.myfico.com/t5/Credit-Cards/Citi-World-to-World-Elite-MasterCard/td-p/1286397
there's other discussion about this on other threads and other forums as well. i don't have a Citi card myself but I read through some of those posts yesterday so conversion seems possible but it depends on your account and standing with citi. Hope that helps.
JPMorgan Palladium (100k), AmEx Platinum (NPSL), AmEx SPG (46k), AmEx BCP (42k), Chase Sapphire Preferred (47k), Citi Prestige (31k), Citi Thank You Preferred (27k), Citi Executive AAdvantage (25k), JPMorgan Ritz-Carlton (21k), Merrill+ (15k), US Bank Cash+ (22.5k), Wells Fargo (12k), Bloomingdale’s (12.4k), Chase Freedom (5k), Discover IT (5k).
