Please provide answers to the following 4 questions:

1 - which ever plan I select, will I have to get everyone in my group to opt-in or do I just upload my list of phone numbers and start texting?

2 - with the free plan - how many individual phone numbers can I text too?

3 - with the $10/mo. plan - how many individual phone numbers can I text too, is it up to 1 message to 500 phone numbers or any combination until the maximum 500 message limit is reach?

4 - when I sent out a text to group and someone within the group replies, am I the only one that will receive the reply message or will everyone in the group also view the reply message?

Thank you,

Sergio