AT&T is dropping its $10 per month, 1,000 text messaging plan and will now offer consumers the choice between an unlimited text message plan or a pay-per text message plan.

We're streamlining our text messaging plans for new customers... AT&T said in a statement. The vast majority of our messaging customers prefer unlimited plans, and with text messaging growth stronger than ever, that number continues to climb among new customers.

Existing customers don't have to change any messaging plan they have today, even when changing handsets.

The change will begin on Sunday.

AT&T said the unlimited text message service will costs $20 per month, while an unlimited text plan for families will costs $30 per month.

Existing users of the $10 per month, 1,000 text message plan can keep it if they wish, said Mark Siegel, a spokesman for the carrier.

To change text plans, users can log on to AT&T Wireless using phone number and password. On the Account Overview page, under Quick Links, choose Manage Features. Then scroll down to the section Web, Text & More, and click the radio button for 1,000 text messages for $10 per month. Then just click next at the bottom of the page and confirm the changes.