Search Networks – Mobile

Hello,
I am trying to find a new mobile network to sign up for but am having a lot of trouble. I’m not looking for ‘display advertising’ networks, such as most Mobile networks are. I need only networks that use ‘keyword targeting’. Currently, I am using Adwords Mobile, Bing/Yahoo Mobile, and JumpTap.com. I tried but can’t get ahold of Medio.com by email or phone, and I am in the process of getting signed up with Chitika.com. If you know of any others, please let me know.

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