Apple phone default is not directly at the same time multiple micro-mail, we first installed in the computer with a quick apple helper !
The installation was successful. We open the "Apple Helper" on our computer and then we connect the iphone to the computer.
After confirming the connection, as shown in the following figure, search for "micro-letter" in the search box and click Install.
After the confirmation of our Apple Assistant in the "Download Management" you will see a download installation progress, prompted after the installation we can try to "micro-trust version of" slightly!
This can be, of course, there may be a flash-back, the solution as long as the mobile phone and computer connection, and then open the "fast with the Apple assistant", using the top right corner of the flash Repair tool to solve this problem, and finally wish you a happy use.
All right, here we go. The way to sign up for multiple micro-letters on the iphone has been solved.