I have done a couple of things to my Xperia XA2 to improve my LTE connection, and I'm not sure what will help you the most.
Reset wireless settings
I did this sometime around September when I was unable to make calls or send texts, but was able to use mobile data:
This feature was constantly causing my mobile connection to drop, resulting in my phone not being able to receive calls, texts. Sometimes I couldn't even make calls.
Reset wireless settings
I did this sometime around September when I was unable to make calls or send texts, but was able to use mobile data:
- Open the Settings app
- Go to System > Advanced > Reset options > Reset Wi-Fi, mobile & Bluetooth
- Reset settings
This feature was constantly causing my mobile connection to drop, resulting in my phone not being able to receive calls, texts. Sometimes I couldn't even make calls.
- Open the Settings app
- Enable Developer mode
- Go to About phone
- Scroll down to the bottom
- Tap on Build number 10 times
- Go back to main settings menu
- Go to System > Advanced > Developer options
- Scroll about halfway down the menu until you find the Networking section
- Enable the Mobile data always active option.