Hello there. 

Recently Bought LG G6 (LG-H870DS) 

The reason was Ingress and Galaxy S5 Became slow and 2Gb Ram not enough now. 

Done lots of research and was looking specificly for waterproof phone like my S5 (Really did like that Phone done give a sh1t about NZ weather :) )

Anyway Phone is fast enough for me and etc. But one huge problem. 

Mobile data is unstable and not comfortable to use at all.  I use same Sim card (Spark 4G) as on previous phone.

1) While on Galaxy S5 i never had a issue with data connection when someone call me for example i talk on Skype and someone call me and Skype call don't interrupt just goes on hold/pause and data smoothly change to 3G without actual disconnection of data stream.

on G6 it goes complite disconnect and takes about a minute to connect back. Really sad. 

2) 4G Random Drop Outs and full Data loss.  (Never happen on S5 at the same places)  (Even with full signal strength)

3) 3G Random Drop Outs and full Data loss.  (Never happen on S5 at the same places)  (Even with full signal strength)

4) Loosing data when driving on motorways (WTF!) Never happen on Galaxy S5  

Anyway LG g6 seems to be a solid phone with high quality components and build. I just wonder what if something wrong with actual settings or sim card or something else? 

what i have tried: 

1) Hard reset. 

2) Manually set the settings for data and APN etc.

3) Update the Software.

4) No dodgy applications running in Memory only: Skype, Ingress, Maps, Hangouts. 

5) Speedtest shows generally slower speeds compare to S5  :(. 

Really love the phone but dont know how to solve the data issue, and dont know is it a fault on the phone and im a fault... 

Just need help to determine what else to try.

Thank you!