So I was approved for a Walmart M/C last week with a measly $250 CL. I immediatley called Credit Solutions (1-866-519-6441) and they told me I could not request a credit increase until I received my card due to security reasons. Not sure what that was all about but I got my card today, activated it and then called back... Approved instantly for 5k! And that's what I asked for.. maybe I should have asked for 10! 
Credit Solutions is the real deal!