Public Mobile APN Settings for Windows 10 Mobile and Windows Phone 8.1 (Nokia and Microsoft Lumia)
Windows phones stopped getting updates years ago. On a current phone, use the Public Mobile settings for Android or the Public Mobile settings for iPhone.
Windows 10 Mobile APN
On Windows 10 Mobile open Settings -> Network & wireless -> Cellular & SIM -> SIM settings -> Add an internet APN
INTERNET APN
Profile Name: Public Internet
APN: sp.mb.com
User name: Blank
Password: Blank
Sign-in type : None
IP Type :Ipv4
Proxy server (URL): Blank
Proxy Port : Blank
MMS APN
Profile Name: Public MMS
APN: sp.mb.com
User name: Blank
Password: Blank
Sign-in type : None
IP Type :Ipv4
Proxy Server : 74.49.0.18
Proxy Port : 80
MMSC (URL): http://aliasredirect.net/proxy/mb/mmsc
MMSC Port: Blank
Maximum MMS Size (KB): 1024
Windows Phone 8.1 APN
On Windows Phone 8.1 open Settings -> Cellular+SIM -> SIM settings -> Add internet APN
INTERNET APN
APN: sp.mb.com
User name: Blank
Password: Blank
Proxy server (URL): Blank
Proxy Port : Blank
IP Type :Ipv4
MMS APN
APN: sp.mb.com
User name: Blank
Password: Blank
WAP Gateway (URL): 74.49.0.18
WAP gateway Port : 80
MMSC: http://aliasredirect.net/proxy/mb/mmsc
MMSC Port: Blank
Maximum MMS Size: 1024
IP Type :Ipv4