Regional U.S. carrier nTelos Wireless today announced that it will begin offering the iPhone 4S Cases and iPhone 4 beginning on April 20. The carrier will be offering the devices at a $50 discount relative to pricing through Apple and the major carriers, with iPhone 4S priced at $149.99/$249.99/$349.99 and the iPhone 4 priced at $49.99.

"As a wireless service provider well-known for delivering the best value in wireless, we're pleased to offer the amazing new iPhone 4S Case to our customers," said Jim Hyde, president and CEO for nTelos Wireless. "iPhone 4S offers an abundance of new features, and with our industry-leading, nationwide smartphone plans, customers can now enjoy the nation’s best networks for less."

nTelos is a regional carrier based in Waynesboro, Virginia with over 400,000 customers. The carrier offers CDMA service in Virginia and West Virginia, as well as portions of Maryland, North Carolina, Pennsylvania, Ohio, and Kentucky, with nationwide service provided through partnerships with Sprint and Verizon.

nTelos offers two individual iPhone 4 Cases for iPhone customers: a $79.99 plan offering 600 minutes with unlimited messaging and data, and a $99.99 plan with unlimited voice, messaging, and data. The unlimited data on both plans does include a soft cap at 5 GB, after which the carrier will throttle data speeds.

C Spire was the first regional U.S. carrier to offer the iPhone last November, moving to offer $50 discounts relative to standard pricing as of last month.

Update: Alaska Communications has also announced that it will begin offering the iPhone on April 20. The carrier operates a CDMA network with approximately 120,000 customers.

Alaska will offer the iPhone at the same price points as other regional carriers, coming in at $50 off the standard pricing through Apple and the major carriers.