Follow the given steps:-
1.Firstly turn off the phone by using the Power key.
2.Next, press and hold the Volume Up + Power button at the same time for a few seconds.
3.Relase held keys as soon as the Huawei logo appears on the screen.
4.Select using Volume buttons option "wipe data/factory reset", and confirm that with Power button.
Insert SIM in Honor 9i1. Take out the SIM ejector tool that must have come with the box.
2. Towards the left-hand side of the phone, just above the power button, you will find a small hole. Insert the SIM ejection tool into it and the tray shall come out.
3. Now carefully insert the SIM card(s) in it and slide the tray back gently.
4. Restart your phone and you will see the SIM card is working.
You can check more on Honor 9i here:Honor 9i specs
Here difference starts,
Kirin 655- Mali 830mp2: 61.2 GFLOPS
Snapdragon 625-Adreno 506:130 GFLOPS
So gaming performance will be better for snapdragon 625
Snapdragon 625 is manufactured in 14nm process
Kirin 655 is manufactured in 16nm process
So both are efficient.
The advantage to Kirin is that it is used in Huawei phones so it will be more optimized since Huawei produces kirin socs.
Visit the Play store and search for WhatsApp Messenger. One you find it, open it and tap on install. Tap on "Agree" to start the download.