Honestly speaking, fast charging is the most relevant and important feature these days in phones. You can charge your phone fully within munites while you are getting ready to leave your home. No, Nokia 5.1 Plus does not support fast charging.
You can also check the complete comparison here: Nokia 5.1 Plus (Nokia X5)
Yes, Honor 9N supports OTG. USB OTG or USB On-The-Go is one of the most recent technologies that allows you to connect your pen drives and in some cases hard disks to your smartphones and tablets. It has a cable and through that cable, you can directly view and use your pen drive in your smartphones.
You can also check the complete specs here: Honor 9N
No, Realme 2 does not have fast charging. However, some software level modifications might have been done for quick charging.
You can find complete specifications here: RealMe 2
I would suggest you go for Nokia 8.1 because it has 12+13MP of a dual camera with Optical Image Stabilization
To record calls on Mi A1 Follow the steps below:
1. Download the ACR call recording app from the play store
2. Then Follow the instructions from the app and allow all the access to the app as shown in the Image below
4. Then Tap the three bar on the top left of the app
5. There you will find the Enable option on the top.
6. Enable it and enjoy the app.
You can also check this video for more detailed information.
Check more details here : Mi A2
No, RealMe 2 Pro does not possess any IP certification to protect your phone against water damage.
What to do if you accidentally dropped your phone in water:
You can see detailed product specifications here: RealMe 2 Pro
The Realme Narzo 10 seems to be the best smartphone under Rs. 12,000 as it gives the best specifications.
Processor: The Realme Narzo 10 comes with the MediaTek Helio G80 processor.
Camera: The Realme Narzo 10 has a camera of 48 MP + 8 MP + 2 MP + 2 MP with F1.8 aperture.
Check Full Device Specifications Realme Narzo 10
Check Other Best smartphones best smartphone under Rs: 12000
Honestly speaking, fast charging is the most relevant and important feature these days in phones. You can charge your phone fully within minutes while you are getting ready to leave your home. Yes, Oppo F9 supports fast charging. It has a type C port which enables fast charging. The 3400mAh battery, if optimized and used correctly, it could give more than a day's battery backup.
To check all the other details of the device use, this link : Oppo F9