Hello,

Can I add external antenna to my Deco to improve cell signal strength to the internal deco modem? I found that these types of external antenna are mostly sma connectors. It should work if I use a adaptor from sma connector ( external antenna)  to  rp-sma connector ( Deco)? As far I've seen that type of rp-sma antennas are used mostly to increase wifi coverage but not on gsm signal. 

Can I use any of the following : 

https://amzn.eu/d/00JbN4xt

OR

https://amzn.eu/d/0gZjjIyX

OR 

https://amzn.eu/d/0ihMQHGj

and using the following connector adaptor:

https://amzn.eu/d/0dsh5b9o

Main focus is to improve gsm signal on my deco in a weak gsm area.

Thank you