OnePlus OP7T - SIM & Network

and mobile data is turned on.
 Scanning always available: Enable this for
your phone to allow location services or other
apps to scan for networks when Wi-Fi is off.
 Open network notification: Enable this for
your phone to notify you when a high-quality
public network is available.
SIM & network
Enable or disable mobile data
Go to Settings > Wi-Fi & internet > SIM &
network, enable/disable Mobile data.
Roaming settings
Go to Settings > Wi-Fi & internet > SIM &
network, enable/disable Roaming.
Enable this for your phone connect to data
services when roaming.
NOTE: Roaming charges may apply. Check with your network provider
for more details.
Preferred network type settings
Go to Settings > Wi-Fi & internet > SIM &
network settings, select Preferred network
type
 2G/3G/LTE (automatic)