Zte MF612 User Manual page 20

Step2. Set PPP Profile Configuration in the following figure:
Set APN for PPP profile, if you obtain a fixed APN from your service
provider, please select Manual APN, otherwise select Auto APN, and
then type the APN string. Dial No. is provided by your service provider.
Step3. Set the PPP Authentication in the following figure:
Choose PPP authentication mode CHAP or PAP, and then give PPP
user name and password to the corresponding authentication mode.
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