RB411UAHR - PPP Link Signal Strength

Good Day

I was wondering if anyone can tell me if there is a way that I can see the signal strength DBI on PPP Client Link for the RB411UAHR with the 3G mini PCIE card.
RB411UAHR.jpg
3G Card for RB411UAHR.jpg
I have put in a Vodacom South-Africa complain in for intermittend signal and they asked me if i can send through some more details about my Routerboard.

Also is there any suggestions as to what I can do to optimize the Routherboard.
Planning to get myself a DB-Pro 2.4Ghz Radio. I was also suggested to do a license upgrade, should I - and why? Is a license upgrade a fireware upgrade?

Can someone please advise me.
PS : Done no modifications to the original OS and license.

Equipement
RB411UAHR with 3G Mini PCI-E Card - attached to the main port got a 3G Yagi Antenna ( TDJ - 0825DS )
3G Yagi Antenna.jpg
Winbox 4.5