PHILADELPHIA (AP) — Their thumbs sure must be sore.

Two central Pennsylvania friends spent most of March in a text-messaging record attempt, exchanging a thumbsflying total of 217,000.

For one of the two, that meant an inches-thick itemized bill for $26,000.

Nick Andes, 29, and Doug Klinger, 30, were relying on their unlimited text messaging plans to get them through the escapade, so Andes didn't expect such a big bill.

"It came in a box that cost $27.55 to send to me," he said Tuesday. He said he "panicked" and called T-Mobile, which told The Associated Press it had credited his account and was investigating the charges.

The two Lancaster-area residents have been practically nonstop texters for about a decade since they attended Berks Technical Institute together.

That led Andes to search for the largest monthly text message total he could find posted online: 182,000 sent in 2005 by Deepak Sharma in India.

Andes and Klinger were able to set up their phones to send multiple messages. During a February test run they found they could send 6,000 or 7,000 messages on some days, prompting the March marathon.