Q: Is there is cap on how many SMS messages you can send out in a month?
A: The number of SMS' included varies from 300 - 5,000/mo. depending upon your plan. You can see yours by going to Settings, My Accounts. You will see your number in your plan. If you run out of SMS and need more, please reach out to support to purchase more for $15 per 1,000 SMS messages.
It looks like all the plans I can see say 500 SMS max per month. Where are the other amounts?