T-Mobile wrapped up a $2.1 billion media review kicked off in September, and IPG Mediabrand's Initiative is the big winner, according to Campaign US. The move includes Sprint’s $1.1 billion media account, which merged with T-Mobile in April. Horizon Media previously worked for Sprint pre-paid mobile carrier Boost, worth roughly $300 million. Sprint handled search and performance media in-house, which was about $350 million. Horizon will retain the Boost business, which Sprint sold to Dish for $1.4 billion in July.
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