topic Re: App working on 3G but not 4G in Network

App working on 3G but not 4G

Bongo2296 — Fri, 15 Sep 2023 21:41:46 GMT

I have an issue with one specific app, it seems to work on 3G and wifi but not 4G.

On 3G and wifi the app works fine, on 4G the connection does not work. The app log reports that there is simply no connection to the destination, whether the target is set to the registered domain or the IP address directly. Is there anything on the Three side that could cause this?

Device is an iPhone 11, I have done a full reset of the network settings already. If it matters, the address that the app is trying to connect to has a DNS record that points to my port-forwarded home network, but I am sure this is setup correctly as I can connect via 3G and wifi in multiple locations.

Re: App working on 3G but not 4G

JonathanB — Mon, 18 Sep 2023 14:29:15 GMT

Hi @Bongo2296,

I wonder if changing the APN will help here? On an iPhone if you find the Access Point Name in your mobile/cellular data options, this will usually default to "three.co.uk". Try changing this to 3internet instead as that APN does tend to work better with port forwarding services.

Thanks,
Jonathan

Re: App working on 3G but not 4G

Bongo2296 — Tue, 19 Sep 2023 12:09:25 GMT

Brilliant, that worked straight away. Thanks Jonathan.