1.  In the United States, cellular service in most areas is limited to voice calls.

2.  They get the phones for free because cellular service companies buy them from Motorola and other manufacturers.

3.  Already, prices for cellular service are falling as more and more companies enter the market, and there are still a lot of systems under construction.

4.  Also, profit margins in cellular services are higher than long distance.

5.  Analysts also expect MCI next week to announce an agreement with at least one regional Bell operating company and possibly GTE Corp. to resell cellular services.

6.  Among those is a partnership with Mannesmann Mobilfunk of Germany that makes AirTouch one of the biggest providers of cellular services in Europe.

7.  Among other things, digital service offers clearer voice quality than traditional cellular service.

8.  Analysts also expect MCI next week to announce an agreement with at least one regional Bell company and possibly GTE Corp. to resell cellular services.

9.  And earlier this year, the company said it would acquire Nationwide Cellular, the largest reseller of cellular services in the U.S.

10.  Any given market can have as many as seven wireless providers compared with two competitors in a market for cellular service today.