I did this on a Friday with BofA during the post 2008 melt down to form a credit line of $X00,000.00 from several cards that has $x0,000.00 credit line on a weekend phone call and I was going to make an extremely large purchase. Monday came and suspect that is when risk analyst come on duty and everything was shut down and I mean everything. It took a while just to get one card activated again.