I've searched the forum but can't seem to find anyone with the same issue.
My phone experiences a total loss of signal for around 5 seconds before reconnecting. This happens frequently through out the day, I would say if I am using a browser for five minutes its not uncommon for it to happen ten times. When watching YouTube I am frequently being alerted to the fact that my phone is no longer connected. I use my phone to make international calls with family via whatsapp which can be very frustrating due to the call going dead throughout a converstaion.
I have replaced the SIM from my provider and this has made no difference. I have reset network settings and still the issue persists. I have checked the APN to confirm they match what my network says it should. It has made no difference. If I switch my 'Preferred Network Type' from 4G to 3G then there is no drop and the phone remains connected but obviously this prevents alot of apps from working as they should (banking, etc)
The WiFi works fine and I've never had an issue with connecting to home my home network but use of the phone when not at home is becoming increasingly frustrating.
Thats an interesting problem... What network are you on? (I.E. - which 4g frequency(s) are you using/is causing the problem?) I think there is a way in service mode to find out the specific LTE band you are connected to when this happens.