139 or 189, which is better?

Personally, I think there are many similarities between these two mobile phone mailboxes. Both of them can directly register their mobile email accounts with their mobile phone numbers. Mobile email accounts are all mobile phone numbers, which support telecom, China Unicom and mobile users. Both of them can send text messages for free through their mobile phone mailboxes. But when it comes to sending and receiving big attachments, I think 189 mobile email is better, because it has a larger capacity and a good upload and download speed.