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No Internet on the MK4 (Wi‑Fi, SIM, or Hotspot)

If your MK4 shows connected on Wi-Fi but nothing loads, it's usually a captive portal, the wrong MVNO APN or a SIM tray that isn't making contact. Open the MK4 browser to finish camp logins, power off before you re-seat the SIM, and enter the APN details exactly as your carrier publishes them.

9" MK4 Multimedia Headunit for Toyota LandCruiser 70 Series (2009-2026)

9" MK4 Multimedia Headunit for Toyota LandCruiser 70 Series (2009-2026)

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Use this article if…

  • Your MK4 shows “connected” but has no usable internet: APN, SIM tray, captive portal, not Bluetooth pairing.
  • Projection won’t start → Phone pairing. If your iPhone hops networks during CarPlay → CarPlay vs Wi-Fi.

Problem

  • Your MK4 has no usable internet over Wi-Fi, SIM or hotspot.

Symptoms

  • Wi-Fi shows connected but you get no usable data.
  • The SIM doesn't register, or it drops when you're moving.
  • Camp or venue Wi-Fi never reaches the internet, so the captive portal stays stuck.

Cause

  • If you're on an MVNO, your APN or carrier settings on the SIM path can be wrong.
  • You can also be blocked by inline fuses, SIM tray contact or local router and security policies.

Fix Step-by-step

  1. Work out which path you're using: Wi-Fi, the built-in SIM or a phone hotspot.
  2. Power off the unit before you re-seat the SIM.
  3. Enter the MVNO APN exactly as your carrier publishes it.
  4. Open the browser on the MK4, then complete the captive portal if one shows.
  5. Download offline map regions while you've got a connection.

Notes

Related Articles

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Still need help?Still stuck after these steps? Tell us what's happening and we'll suggest the next step. Tell us your carrier name, whether the SIM is prepaid or post-paid, whether that SIM works in a phone, and any captive portal (camping Wi-Fi) you're fighting. Start a support ticket