NEW YORK - (AP) - Two lawmakers say it's time for prepaid cellphone users to identify themselves.

New York Democratic Sen. Chuck Schumer and TexasRepublican Sen. John Cornyn have introducedlegislation requiring consumers to produce identification beforebuying such phones.

That's rattled some civil liberties groups, who say the bill maythreaten privacy rights.

Prepaid phones can be a lifeline for people with limited incomesor poor credit.

But since they can be purchased anonymously, they're a favoredtool of drug dealers and other criminals looking to cover theirtracks.

Prepaid phones also have been linked to suspected terroractivity.

Authorities say accused Times Square bomb plotter Faisal Shahzadused one to purchase a car in which to hidethe bomb.