If you are troubleshooting Public Mobile APN settings because data, MMS or hotspot suddenly stopped working, do not start by copying a random “fast APN” from YouTube. Public Mobile’s current official Android settings use sp.mb.com as the APN. The MMS settings include mmscproxy.mobility.ca, port 8799, MCC 302 and MNC 220. Start with the carrier’s own settings, then troubleshoot the phone around them.
Most phones configure themselves automatically. Manual Public Mobile APN settings matter most after switching phones, inserting a SIM into an unusual Android device, resetting network settings, importing a phone from another market or dealing with a broken data or MMS configuration.
Current Public Mobile APN settings for Android
Public Mobile’s official Android data setup page currently lists these core fields:
| Field | Current value |
|---|---|
| Name | Public Mobile |
| APN | sp.mb.com |
| MMSC proxy | mmscproxy.mobility.ca |
| MMSC | http://aliasredirect.net/proxy/mb/mmsc |
| MMS port | 8799 |
| MCC | 302 |
| MNC | 220 |
Leave fields you do not need alone unless Public Mobile or your device instructions specifically tell you to change them. APN screens differ wildly between Android manufacturers, and filling every blank box is not a sign of thoroughness. Sometimes it is just a creative way to break a working connection.
Before changing anything, try the boring fixes
APN editing should not be the first reaction to every data problem.
- Turn airplane mode on for about 15 seconds, then turn it off.
- Restart the phone.
- Make sure mobile data is enabled.
- Check that your Public Mobile subscription is active and still has usable data.
- Install pending system and carrier updates.
- If the phone offers “Reset network settings,” consider that before manually building a new APN.
In May 2026, Public Mobile users reported a wider data disruption where toggling airplane mode or refreshing network settings helped some devices. That is a reminder that not every data failure is caused by your APN. If many people are reporting a network problem at the same time, rewriting twenty settings on a perfectly configured phone may only add a second problem.
How to edit Public Mobile APN settings on Android
The exact menu names vary. On many Android phones the path looks something like:
Settings > Network and Internet or Connections > Mobile Network > Access Point Names
Open the active Public Mobile profile first. Compare it with the official fields above. If a required field is wrong, correct it, save the profile and restart the phone.
If there is no Public Mobile profile, create a new APN and enter the carrier-provided fields. Save it, select it as the active APN and reboot.
Some Android devices also expose APN type, APN protocol, roaming protocol, bearer and MVNO fields. Public Mobile Community troubleshooting has used values such as default,mms,supl or additional device-specific entries, but those are not a reason to override a working official profile. Use extra fields only when the standard carrier setup fails and you have model-specific guidance.
What about iPhone?
Public Mobile also has an official iPhone APN guide. It currently tells users to verify SP.MB.COM in the Cellular Data Network settings when those fields are available.
Many iPhones load carrier settings automatically and may not let you permanently edit every APN field. If the setting is missing, locked or keeps reverting, do not install an unknown configuration profile just to force it. Update iOS, restart the phone, reset network settings if appropriate and contact Public Mobile if the carrier profile appears wrong.
How to fix mobile data that does not work
If calls and texts work but websites and apps do not load on cellular data, focus on the data APN first.
- Confirm the active APN is sp.mb.com.
- Make sure the Public Mobile SIM or eSIM is selected for mobile data on dual-SIM phones.
- Temporarily disable Wi-Fi so you know which connection you are testing.
- Restart after saving APN changes.
- Check for a network outage before assuming the phone is defective.
Also inspect data limits built into Android. A phone-level data cap can block mobile data even though the Public Mobile account still has plenty remaining.
How to fix MMS picture and group messages
MMS is where incomplete APN profiles often reveal themselves.
Check these fields carefully:
- MMSC: http://aliasredirect.net/proxy/mb/mmsc
- MMS proxy: mmscproxy.mobility.ca
- MMS port: 8799
- MCC: 302
- MNC: 220
Then save and restart the phone. Make sure mobile data is enabled while testing MMS. A phone can sometimes send ordinary SMS over the cellular voice and messaging system while picture or group messaging still depends on the correct mobile-data path.
If MMS fails only with one contact or one messaging app, test with another recipient before rebuilding the APN again. That helps separate a carrier configuration problem from an app or conversation-specific problem.
Does hotspot need a separate Public Mobile APN?
Public Mobile’s current official setup does not publish a separate consumer hotspot APN as the normal starting point. Hotspot usually shares the phone’s mobile-data connection.
If phone data works but hotspot does not:
- turn hotspot off and back on
- restart both the phone and connected device
- forget and reconnect to the hotspot Wi-Fi network
- check whether your phone has a separate “tethering” APN field or carrier restriction
- reset network settings if the phone has carried old settings from another carrier
Do not substitute isp.mb.com just because you found an old forum post. Public Mobile’s current official consumer APN is sp.mb.com. If a specific device requires something different, verify that with Public Mobile or the device manufacturer.
The site’s Public Mobile hotspot and tethering guide covers hotspot-specific troubleshooting.
Why old APN guides are risky
Public Mobile’s MMS configuration changed in past years. Old posts may still show an IP-address MMS proxy or port 80. The current official setup uses the hostname mmscproxy.mobility.ca and port 8799.
That is exactly why APN guides need fresh research. A ten-year-old forum answer can be technically accurate for the day it was written and still be the wrong thing to enter now.
Do APN settings make 4G faster or “unlock 5G”?
No credible carrier guidance supports the idea that a secret APN turns a 4G plan or incompatible phone into 5G. Network speed depends on your plan, device, coverage, congestion and network conditions.
Use APN settings to establish the correct data path. Do not treat them like engine tuning.
When to stop editing and contact support
Contact Public Mobile when:
- the official APN is correct but data still does not work
- multiple phones fail with the same active SIM or eSIM
- your account shows active service but the network will not provision data
- the APN fields are locked and clearly incorrect
- service failed immediately after activation or a SIM change
Before opening a support ticket, note the exact phone model, operating-system version, whether calls work, whether SMS works, whether MMS works, whether hotspot works and which APN is selected. That shortens the guessing game.
Public Mobile APN settings FAQ
What is the Public Mobile APN?
The current official APN for normal mobile data is sp.mb.com.
What are the current Public Mobile MMS settings?
Public Mobile currently lists MMSC http://aliasredirect.net/proxy/mb/mmsc, MMS proxy mmscproxy.mobility.ca, port 8799, MCC 302 and MNC 220.
Why does my phone show isp.mb.com?
Older devices or carrier profiles can show different values. Public Mobile’s current official consumer setup lists sp.mb.com, so verify against the carrier guide before changing anything.
Do I need mobile data on for MMS?
Mobile data generally needs to be enabled for MMS to work correctly, even when the message itself does not meaningfully consume your normal browsing allowance.
Does hotspot use sp.mb.com?
Hotspot normally uses the phone’s mobile-data connection. Public Mobile does not currently publish a separate hotspot APN as the standard consumer setup.
Should I change APN protocol or MVNO fields?
Only when the normal official setup fails and you have model-specific guidance. Those fields vary by device and should not be changed simply because an old forum list contains more entries.
Why did data stop working even though my APN is correct?
The cause can be an outage, stale network registration, account provisioning, a phone-level data limit, dual-SIM selection or another device issue. APN is only one part of troubleshooting.