Verizon Wireless is continuing its crackdown on wireless scams with a Tuesday lawsuit against several companies accused of sending unsolicited, mortgage-related text messages.

Verizon filed suit against Pennsylvania-based Money Warehouse, Inc., known as All State Mortgage Lender, and other unnamed companies for allegedly sending 800,000 spam text messages to Verizon Wireless customers and employees beginning in February 2009.

Verizon filed suit in U.S. District Court in Trenton, N.J., accusing the companies of violating the Federal Telephone Consumer Protection Act, which bans the use of an auto-dialer to contact wireless customers.

"At a time when many Americans are concerned about making their mortgage payments, these types of unwanted text messages, from unknown senders, can be upsetting," Steven E. Zipperstein, vice president and general counsel at Verizon Wireless, said in a statement. "Our company will continue to work diligently to stop these people who break the law and harass our customers."

Late last month, Verizon reached a $50,000 settlement with St. Louis-based National Auto Warranty Services and Florida-based Explicit Media for making illegal telemarketing calls promoting car warranties.