How to boost my cellular/mobile signal range?

I currently have the iPhone 5S on the Three network. I'm able to get 4G as I get it at my neighbours house across the road but can't not seem to pick it up at my house (Unless I lean out the window)

I'm not an engineer so I'm not to familiar with what's out there but on a quick google I see something called a Cellular Repeater? Or Signal Booster? Antenna's etc?

I've come across numerous boosters for Wi-Fi but can't seem to find any for 4G/LTE etc!

I need something that will just give me that extra boost so I can get the 4G!

Where I live, I can't have decent Wi-Fi (Bad wiring) so a good 3G and 4G is vital to me!

Just to clarify:

I need a signal booster or an antenna of some kind to give my iPhone 5S, on the Three network that boost to get the 4G signal.

If you can offer some actual product that would be fantastic or give me an idea of where to look!

Peoples' homes are usually the cause of it. Metal in the roof.

Nothing YOU can do
it is just weak…(and as it is weak, probably will not see a speed benefit)

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