On 8/30/2017 at 09:13, sixwheeledbeast said:

They are SMA connectors.

I have used SMA to F type connectors in the past to utilise existing loft bound coaxial.

Obviously you need to end up with male/female to make an extension lead.

I've found the following on ebay: Lead

It says it is for WiFi but has the same connections. Will this lead be okay for use as an extension for a GSM device?

Probably junk cable at that price.

 

 

Could someone please point me to a reputable website which sells either good quality extension cables, or new 2G GSM antennas please

58 minutes ago, neon555 said:

Could someone please point me to a reputable website which sells either good quality extension cables, or new 2G GSM antennas please

There's many

 

https://www.gsm-antennas.co.uk/cable-extensions-ethernet-power-leads-sma/sma-extension-cable-range-low-loss.html?limit=all

Just a quick  question   on your phone  is mobile data reception any better out side in the garden,  if yes can you fit t bar outside  the higher up the better.

On gsm band the loss on coax length at 10m is extremely high  wifi coax may look the same but it is just  cheap  tat at this band.    A high gain antenna from  a redcare gsm module or gsm antenna from a car phone kit might solve the problem try flea bay