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spusu Internet Not Working Fix Guide
The order reflects likely causes — on Three, outages and incorrect APN account for most issues, so start there.
As an MVNO, spusu doesn't operate its own masts — it buys wholesale access to Three's infrastructure. That means a Three network outage will affect spusu too, and the fastest way to confirm a wider problem is to check Three's live status page rather than assuming it's a fault with your phone.
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Step 1: Check for spusu Network Outage
Before changing any settings, check whether spusu is experiencing a network outage in your area. An outage is the most common reason for sudden mobile data loss across an area.
Check spusu status: https://www.three.co.uk/support/network-and-coverage/service-status
If there is a confirmed outage in your area, no settings changes will help — wait for spusu to restore the network and check the status page for estimated recovery time. You can also check Downdetector for user-reported issues.
Step 2 — Quick Spusu Fixes to Try First
Running through these five checks in order — together they resolve the large majority of spusu data faults without needing to touch APN settings at all.
- Aeroplane Mode on for half a minute, then off, is the quickest re-registration fix.
- When the toggle doesn't help, a full restart clears leftover cached network data.
- Double-check Mobile Data is enabled: Settings › Mobile Data (iPhone) or Settings › Connections › Mobile Data (Android).
- Look at your data balance in the spusu account portal — running out of allowance produces symptoms that look exactly like a network fault.
- Power down, take out and reinsert the SIM — a weak contact is a surprisingly common cause of intermittent data.
Step 3: Verify spusu APN Settings
A wrong APN entry is a leading cause of data problems, especially following a factory reset, OS update, SIM swap, or a move from another network. Check and correct it if needed.
Correct spusu APN: spusu
How to check APN settings on Android
- Navigate to Settings › Connections › Mobile Networks › Access Point Names (Samsung) or Settings › Network & internet › Mobile network › Access point names (Pixel).
- Open the spusu APN entry and confirm it reads exactly spusu — watch for extra spaces.
- Check APN Type includes at minimum default and supl.
- If the entry is missing or wrong, the spusu APN settings guide has the full set of values.
- Save, activate with the radio button, and restart.
How to check on iPhone
- Look at Settings › Mobile Data › Mobile Data Network, if shown.
- Confirm it displays spusu.
- If greyed out, the carrier bundle manages it — check Settings › General › About for an update.
Step 4 — More Advanced Spusu Fixes
- Look for and apply a pending OS update: Settings › System › Software Update — this occasionally resolves registration faults on its own.
- iPhone users: check Settings › General › About for a carrier update, installing if available.
- Reset network settings as a next step: Android — APN settings, ⋮ › Reset to Default. iPhone — Settings › General › Transfer or Reset iPhone › Reset › Reset Network Settings. This wipes saved Wi-Fi passwords too.
- A SIM that works in another phone confirms the handset is at fault, not the network or SIM.
- Test a different SIM in your phone — if that one connects fine, your spusu SIM or account is the likely cause.
- Request a free SIM replacement from spusu if the problem persists after all of the above.
- Call spusu support on help for an account-level check — they can also confirm whether there's a known issue with your local mast.
Common Causes of spusu Data Not Working
| Symptom | Likely Cause | Fix |
|---|---|---|
| Data works then stops randomly | Poor signal, congestion, or SIM contact issue | Reseat SIM; check coverage map |
| Very slow speeds (not outright broken) | Data throttling, network congestion | Check if data cap hit; try different time of day |
| After iOS/Android update | OS update overwrote network settings | Reset network settings and re-enter APN |
| Sudden data loss, was working before | Network outage or SIM registration issue | Check status page; toggle Aeroplane Mode |
| Works on Wi-Fi but not mobile data | Mobile data toggle off or APN wrong | Enable mobile data in Settings; verify APN |
| Signal bars showing but no internet | Incorrect APN or data plan expired | Verify APN; check data balance in the spusu account portal |
| After factory reset / phone change | APN settings not transferred | Re-enter APN settings: spusu |
Frequently Asked Questions — spusu Internet Not Working
How do I fix spusu mobile data not working?
Aeroplane Mode is the place to start — on for 30 seconds, then off — which re-registers your phone on the network and fixes many cases outright. If data is still down, review Settings › Mobile Networks › Access Point Names to confirm the APN reads exactly spusu. It's also worth checking https://www.three.co.uk/support/network-and-coverage/service-status for a known outage. If it's still not working after that, restart the phone and re-enter the APN from scratch.
What is the spusu APN for mobile data?
spusu is what you need. The spusu APN settings guide has the rest of the fields too, in case you need to set up MMS or check the values on a second device.
Is spusu down right now?
Check https://www.three.co.uk/support/network-and-coverage/service-status for spusu's official outage status. If it looks fine there but you're still having trouble, Downdetector sometimes picks up localised issues faster.
Why does spusu show signal but no internet?
Seeing signal bars only shows the phone is registered on the mast — it says nothing about whether data is actually flowing. Check that: Mobile Data is on in Settings, APN matches spusu exactly, you haven't exhausted your data allowance, and there's no outage in your area right now.
How do I reset spusu APN settings?
Open APN settings on Android and tap ⋮ › Reset to Default. iPhone users: Settings › General › Transfer or Reset iPhone › Reset › Reset Network Settings — this wipes Wi-Fi passwords as a side effect, so have those handy. Re-enter spusu afterwards.
spusu data stopped working after a phone update — what do I do?
This tends to happen as a side effect of OS updates overwriting custom network settings. Go to Settings › Mobile Networks › Access Point Names and put spusu back in. iPhone owners should also check Settings › General › About for a carrier update, then restart.