Website Working on Wi-Fi but Not on Mobile Data? Here’s Why
Your website may work perfectly when you’re connected to Wi-Fi but suddenly stop loading when you switch to mobile data. This can be especially confusing if the problem started after changing hosting providers.
If your website works on Wi-Fi but not mobile data, the issue may not be your WordPress installation, theme, or website content. It could be related to DNS, IPv6, SSL, firewall settings, server configuration, or network routing.
This problem can also happen because different networks don’t always connect to your website in exactly the same way. Here’s how to identify the possible causes and fix them.
Why Does a Website Work on Wi-Fi but Not Mobile Data?
Wi-Fi and mobile networks can use different DNS resolvers, IP addresses, routing paths, and network configurations.
For example, your home Wi-Fi may correctly resolve your domain to your new hosting server, while your mobile carrier may still have an outdated DNS record or encounter a routing problem.
This is particularly common shortly after changing web hosting, because your domain’s DNS records and server IP address may have changed.
1. Your DNS Changes Haven’t Fully Propagated
DNS propagation is one of the first things to check after a hosting migration.
When you move your website to another server, your domain needs to point to the new server’s IP address. Different DNS resolvers may update their cached information at different times.
Your Wi-Fi connection might already be using the new IP, while your mobile carrier could still be resolving the domain to the old server.
Check your domain’s DNS settings and confirm that the A record points to the correct new server IP address.
If you recently changed nameservers or DNS records, some inconsistent access may continue until cached DNS information updates.
2. Your Mobile Carrier Uses a Different DNS Resolver
Your mobile carrier may use DNS servers that are different from the ones used by your Wi-Fi provider.
If the carrier’s DNS resolver has outdated information, your website may fail to load through mobile data even though it works normally over Wi-Fi.
Try accessing the website using another mobile network if possible.
If the website works with one carrier but not another, the problem may be related to DNS resolution or network routing rather than your website itself.
3. An Incorrect IPv6 Record Is Causing Problems
Another potential cause is an incorrect IPv6 configuration.
Your domain may have an AAAA record that points to an IPv6 address. Some mobile networks rely heavily on IPv6, so an incorrect AAAA record can cause connection problems.
Your Wi-Fi network may successfully connect through IPv4, while a mobile network attempts to use IPv6 and reaches the wrong destination.
Check your DNS records for an AAAA record. If your hosting server doesn’t support the configured IPv6 address, the record may need to be corrected or removed.
Don’t change DNS records blindly. Confirm your hosting provider’s recommended configuration first.
4. Your New Hosting Server Is Blocking Mobile Networks
Your hosting provider may have firewalls or security systems that block certain IP addresses or network ranges.
Mobile carriers can use large pools of shared IP addresses, and automated security systems may occasionally flag some traffic as suspicious.
Check your hosting firewall, WAF, and security logs for blocked requests.
If you discover that requests from mobile carrier networks are being blocked, contact your hosting provider before making major firewall changes. They may be able to identify the specific rule responsible.
5. Your SSL Certificate Isn’t Configured Correctly
SSL problems can appear after a hosting migration.
Your new server needs a valid SSL certificate for your domain, and the certificate should be correctly installed and configured.
Test both:
- https://yourdomain.com
- https://www.yourdomain.com
Make sure both versions resolve correctly and redirect to your preferred version.
If HTTPS works on Wi-Fi but produces errors on mobile data, investigate the certificate, server configuration, DNS records, and redirect rules.
6. A WordPress Security Plugin Is Blocking Mobile Users
If your website uses WordPress, a security plugin or firewall may also be responsible.
Security tools can block IP addresses, rate-limit requests, or identify certain traffic as suspicious. After a hosting migration, changes to your server configuration can sometimes produce unexpected security behavior.
Review your security plugin’s firewall logs and blocked IP list.
Look for repeated blocks involving mobile carrier IP ranges. If you identify a problem, adjust the relevant rule carefully rather than disabling your entire security system.
7. Your Mobile Network Has Cached the Old IP Address
DNS caching can create temporary differences between Wi-Fi and mobile connections.
Your computer may already be using the new server’s IP address, while a mobile network’s DNS resolver could still have cached the previous address.
This is especially likely if your hosting change happened recently.
Test your website from several networks and locations. If the issue gradually disappears, DNS caching or propagation may have been the cause.
8. Your Domain Is Pointing to the Wrong Server
A hosting migration can involve several DNS records, and changing one record doesn’t necessarily update everything.
Your A record, AAAA record, CNAME records, and nameservers should point to the configuration recommended by your new hosting provider.
If one record still references the old hosting environment, different networks may receive different results.
Check the complete DNS configuration instead of changing only the main A record.
How to Test Your Website on Mobile Data
Before changing anything, perform a few simple tests:
- Turn off Wi-Fi on your phone.
- Enable mobile data.
- Open the website in an incognito or private browser window.
- Test both www and non-www versions.
- Try another mobile device.
- Test another mobile carrier if available.
- Check whether the problem affects HTTPS.
- Note the exact error message displayed.
These tests can help determine whether the problem is device-specific, network-specific, or related to your hosting configuration.
If the website fails across several mobile networks but works on Wi-Fi, investigate DNS, IPv6, SSL, firewall, and server settings more closely.
How to Fix the Problem After Changing Hosting
Start with DNS. Confirm that your domain points to the correct new server and that there aren’t outdated A or AAAA records.
Next, verify your SSL certificate and HTTPS configuration. Then review your hosting firewall, WAF, and WordPress security settings.
If everything appears correct but the website still fails on mobile data, contact your hosting provider.
Give them your domain name, the time the problem started, the affected mobile carrier, and the exact error message. Tell them that the website works through Wi-Fi but fails through mobile data. This information can help them investigate DNS resolution, server routing, or firewall logs.
Conclusion
If your website works on Wi-Fi but not mobile data, don’t immediately assume that your website files or WordPress installation are broken.
After changing hosting, investigate DNS propagation, DNS records, IPv6, SSL, firewall rules, caching, and network routing first.
Testing your website across multiple networks is one of the easiest ways to narrow down the problem. Once you determine whether the issue is caused by DNS, your hosting server, or a specific mobile network, finding the right solution becomes much easier.