You can answer you question in two ways.
First check each of your cell phone bills now. See how many minutes each one of you speak to the other two during a month. Multiply by three (3) the highest number of minutes, whoever has the called the other two the most, to determine your estimated monthly usage. Some websites have suggested to then increase this by 20% (x1.20) to cover unanticipated calls (to clients and family on the
iden network).
Second, our sales person stated that Nextel has done a study of Direct connect users and found that the average usage was 100 minutes. Keep in mind Direct connect is reported to being billed in one second increments.
Whichever plan you chose can be changed. After a month ( or three) your Nextel dealer can perform a account review to determine if you need to increase your shared minutes.
Remember to ask for discounts!. If you accept American express you can get 5% off your monthly fee. Go to the american express website and look under merchants benefits. Punch in your american express vendor id, and you will see Nextel's site with a 5% discount. Also if you service large companys you may want to ask your dealer if you eligible for discounts.
Finally purchase at the end of the month when the dealer is trying reach their monthly quota.