How much do you charge for sending short messages in groups?

As far as I know, there are five ways to send short messages by mobile phone:

1, the function of the mobile phone. You can send short messages to all users in groups, and the tariff is a normal domestic short message standard. Mobile network 1 wool/piece, mobile network 1. 5/ article. There is no upper limit for mass sending (of course, the maximum amount you can save in your mobile phone and SIM card is the upper limit! )

2. Functions on the M-Zone card. Similar to the function of the mobile phone itself, the tariff is the same. It's just that the group sending limit is a little less, because only the numbers on the SIM card can be sent in groups.

3, mobile office assistant, need to apply, similar to QQ software, SMS group can only be sent to the mobile network, 1 Mao/article. You can send up to 500 articles in groups.

4, mobile secretary, need to open this business locally, the other is the same as 3.

5, mobile email, at present, only 50 short messages can be sent in groups, and it can also be sent in groups on the mobile network, but the tariff is 5 cents/piece, which is cheaper!

Note: every 70 words counts as a short message, that is to say, if there is a long short message of 200 words, that one counts as 3!