SEATTLE - Coffee giant Starbucks has announced all of its 7,100 stores nationwide will close later this month for a few hours as the company tries to boost sagging sales. 

Starbucks CEO Howard Schultz says all stores will close Tuesday, February 26th at 5:30 p.m. for three hours to retrain baristas on skills like making the perfect shot or steaming milk. 

KGW

Schultz, who reclaimed the CEO title in January, is looking to give a double shot to the coffee company, which has watched its stock price lose almost half its value the past year. 

He's already announced plans to cut hot sandwiches from the menu and slow further expansion. 

The other big news out of Starbucks:  T-mobile is out, AT&T is in.  

Starbucks will start offering a mix of free and paid wireless Internet service through AT&T effectively ending their six year partnership with T-mobile.  That will be gradually phased in across the country. 

More changes are expected to be announced a company meeting next month.