The number of traditional phones, commonly referred to as landlines, in Michigan continues to drop, as cell phones now make up three-quarters of all phones.
Verizon Wireless, AT&T and Sprint say their networks were congested as the quake sent people scrambling for the phones.
Cell phones are more powerful than ever, with innovations and features being unveiled constantly. But, reports CBS News Business and Economics Correspondent Rebecca Jarvis, all that convenience could come with a cost.
Got an old cell phone? Drop it off at your local Chevy dealer, and help a U.S. service member phone home.