Hello everyone
Please helps me to pick one phone:

1). AGM M1

Main Features:
RAM: 64MB
ROM: 128MB
External Memory: TF card up to 32GB
CPU: SC7701
Back Camera: 2.0MP ( SW 3.2MP )
Display: 2.0 inch screen
Functions: IP68 Waterproof, Dustproof, Shockproof
Bluetooth: BT2.1
SIM Card: dual SIM cards dual standby ( one SIM supports 3G, another SIM supports 2G )
Networks:
2G: GSM 850/900/1800/1900MHz
3G: WCDMA 900/2100MHz
2). Vkworld Stone V3

Main Features:
RAM: 64MB
ROM: 64MB
External Memory: TF card up to 8GB
Chipset: SC6531
Back Camera: 1.3MP
Display: 2.4 inch, 320 x 240 pixel screen
Features: IP67 Waterproof Dustproof Dropproof
SIM Card: Dual standard cards, dual standby
Bluetooth: 4.0
Networks: 2G: GSM 850/900/1800/1900MHz
3). DTNO.1 A9

Main Features:
RAM: 32MB
ROM: 32MB
External Memory: TF card up to 16GB
Back Camera: 0.3MP
Display: 2.4 inch, 240 x 320 pixel TFT screen
Features: Calendar, Music, Video, FM, Calculator, Power Bank, Ebook, Gallery
SIM Card: dual SIM dual standby, dual standard card
Bluetooth: V2.0
Networks: 2G: GSM 850/900/1800/1900MHz

Check the video:

https://www.youtube.com/watch?v=hmiZzoYZh7o
I really want your professional opinion.

thanks