Lebara Internet APN-Einstellungen für OnePlus 5

Go to Settings More / Mobile networks Access Point Names

Press ➕ on right top corner.

Name: Lebara Internet
APN: internet.t-d1.de
Proxy:
Port:
Username:
Password:
Server:
MMSC:
MMS proxy:
MMS port:
MCC:
MNC:
Authentication type:
APN type: default,supl
APN protocol: IPv4
APN roaming protocol: IPv4
Bearer: Unspecified
APN PPP phone number: Not set

Do not change the default values set by device for all blank fields above.