OnePlus 9 Pro - SIM & Network; Dual-Channel Network Acceleration

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 Scanning always available: Allow location
services or other apps to scan for networks,
even when Wi-Fi is off.
SIM & network
Enable or disable mobile data
Go to Settings > Wi-Fi & network > SIM &
network, enable/disable Mobile data.
Preferred network type settings
Go to Settings > Wi-Fi & network > SIM &
network, select Preferred network type
 2G/3G/4G/5G (Automatic)
 2G/3G/4G (Automatic)
 2G/3G (Automatic)
 2G only
 Smart 5G: Based on usage scenarios,
logically match 5G network to improve
battery life.
Dual-channel network acceleration
Go to Settings > Wi-Fi & network, tap Dual-
channel network acceleration. With dual-
channel technology, the mobile data and Wi-Fi
will be used at the same time to provide a
smoother Internet experience.