139 Can I really send SMS and MMS for free?

139 mailbox can send 30 SMS messages and 20 MMS messages for free every month. First of all, this is for sure, no doubt; When sending, you can find the message in the value-added service in the lower left corner of the mailbox, or you can hook the contact person in the address book and send it directly. This is convenient because sometimes some big words can be written by computer, and it is free; Personally, it is worth recommending that the email will automatically send you the email content in the form of SMS, which is very practical and free; The disadvantage of this mailbox is that the speed is still unstable, and occasionally there are dead pages. Simple mail processing is not as good as 163 and 126. Finally, the 139 mailbox service will be slightly different due to the policy of moving in different provinces. Take Guangdong Mobile as an example.