RadioShack, which is struggling to stay in business in the wake of rapidly declining foot traffic, is trying something new to lure customers into its stores: “Fix It Here” repair stations for Apple and Samsung mobile devices. The Westfield Montgomery Mall store is among the first to offer repairs for cracked screens, broken buttons, water damage and battery issues; cost ranges from $80 to $199.99. “People can go shopping, come back and have virtually a brand new phone,” says repair tech David Flores. Repair services are not yet available at the RadioShack stores in Rockville or the Cabin John Shopping Center, but there are plans to expand the program later this year. They’d better move quickly: RadioShack’s stock, which once traded for $76 per share, dipped below $1 this week as bankruptcy rumors swirled.