Cannot Access PWA Link on Mobile

Hi everyone,

I’ve deployed a project on Vercel that has been working fine for months. Recently, however, users on mobile devices (Wi-Fi and cellular) have started seeing “Connection Timed Out” or “This site can’t be reached” errors. The site works fine on desktop browsers (both Mac and Windows), but it cannot be accessed on mobile devices (Android and iOS, different networks, VPN, etc.).

I’ve already tried:

Clearing cache and cookies on mobile browsers.
Using different networks and devices.
Checking my deployment logs – no errors reported.

Additionally, users cannot add the PWA app on their mobile devices.

I suspect there might be an issue with caching, SSL, or a CDN misconfiguration. I’m on the Hobby plan, so I can’t open a direct support case with Vercel.

Is anyone else experiencing this? Any ideas on what to check next, or if there’s a known issue with Vercel’s Edge Network for mobile traffic?

Any help would be appreciated. Thank you!

only cannot open through the link, both ios and android, cannot access the PWA also

Vercel Staff

Hey . If you share the site URL here, then we can all dig into the network details to help you debug. But I have a few ideas to share if you'd prefer to solve it on your own

PWA Configuration
- Verify your manifest.json file is properly configured and accessible
- Check that your service worker isn’t causing conflicts on mobile
- Ensure HTTPS is working correctly (PWAs require secure contexts)
Vercel-Specific Checks
- Check your vercel.json configuration for any mobile-specific headers or redirects
- Verify that firewall rules aren't preventing mobile access
- Try redeploying to see if it resolves the issue
Browser Tools
- Use browser dev tools on mobile (like Chrome DevTools via USB debugging for Android)
- Check the Network tab for failed requests
- Look for any console errors specific to mobile

https://nssbsystem.vercel.app/

nssbsystem.vercel.app

Namicoh Suria Sdn Bhd

here you go, please try checking it, it affecteing most users

edit: i tried the steps you provided , all seems fine, but still can't open in some phone and browser.Even can't open in my phone itself

reply to #4

when i try with vpn, i can access the website

reply to #4

https://nssbsystem.vercel.app/

nssbsystem.vercel.app

Namicoh Suria Sdn Bhd

here you go, please try checking it, it affecteing most users

edit: i tried the steps you provided , all seems fine, but still can’t open in some phone and browser.Even can’t open in my phone itself

Vercel Staff

I was able to visit the site without any errors on mobile browsers. And you mentioned that it works for you with VPN. That makes me think there may be a network issue preventing access. Possibly with a specific service provider. We have a guide with tips to help debug that:

https://community.vercel.com/t/resolving-ip-blocking-issues/171

Hi ! 🙂

We haven't heard back from you. If you're still stuck, feel free to share any updates, logs, or additional context that might help us assist you better!

Hi everyone,

I’ve already tried:

Clearing cache and cookies on mobile browsers.
Using different networks and devices.
Checking my deployment logs – no errors reported.

Additionally, users cannot add the PWA app on their mobile devices.

I suspect there might be an issue with caching, SSL, or a CDN misconfiguration. I’m on the Hobby plan, so I can’t open a direct support case with Vercel.

Is anyone else experiencing this? Any ideas on what to check next, or if there’s a known issue with Vercel’s Edge Network for mobile traffic?

Any help would be appreciated. Thank you!