I am on Three and use the default APN settings however I keep losing data connectivity. The phone still shows a signal and either 3G or H, however it turns Orange and I cannot use any data. Toggling flight mode, data or rebooting the phone doesn't solve the issue. I have to keep going in to my APN settings and using the reset to default option just to get my internet connection back on. This has been happening since yesterday and is happening in multiple areas.

I'm using a Nexus 5 on Three.

What's going on?