U.K mobile coverage for 4G

[Steffan_3]

So im pretty stuck with this scenario, i work all around an industrial site, gate house being one and an office in another part.

When I first came here I noticed ( Using EE provider at the time) I could Not get data while in the Office. but could outside in the yard area, it was ok in the gatehouse (if i recall)

I switched to 02 as someone told me they get signal in the office with this provider, and yes i could at least have signal inside office, but its not ideal its always 3g, sometimes im standing around the gatehouse looking to get it to change to 4g ( hit and miss)

Also the main building i believe we have 02 wifi around ( could be EE) but im sure its o2.
Im not a manager so i have no access, but could this interfere??

And basically i dont really want to buy sim cards from Each provider just to find out the most suitable, not to mention the websites claiming "coverage excellent" tend to be a lie, since im not getting 4g the majority of the time.

please help me im so sad n lost

 

[RememberThe5th]

You wont get good signal in any room at wall thickness of 20cm+ with steel/metal structure and other stuff in it.

Where i work at restaurant, especially building of that is old fortress, wall thickness of 1m (Yes 1 meter), inside without pointing out phone you cannot get 4G but half of 3G, the building is parts of stones.