MCI will kill your credit. I am batteling with MCI Customer servise During whole Year. They screw up my credit, Billed me for wrong plans. Billed me for thousend dollars! Tey billed me 3( THREE) different plans in the SAME time , for the same phone and number.Your wait is hours and days for Most stupid customer service Reps and Supervisors EVER. They hang up on your, They can't fix a ****. They say they did fixed it and tomorrow you get letter that you are on clooction. Buy- buy credit history. Can go on for hours. They suck! Screwed up my life and will do it to yours!