@Abhi093 In the line of Sight, there is a building in between the tower. I am wondering if the antenna would pick up the signal. Need to check. thanks

@mallipoo Ya mine too similar issue, wanted a temporary and movable setup, since covid had moved back to native. Earlier i was using Jio Fibre in bengaluru. dint had an issue for a day. In native local Service providers who takes up the deposit and with hefty tariffs and i heard not reliable service. So taught of relying on 4g. Earlier i took up the DLINK 920 router, it was worse and frequent disconnection, surprisingly it died in 15 days. now to claim warranty i have to visit bengaluru, Felt its unreliable and looked at the top of the line MR600. though without CA i am seeing a bump in speeds then mobile hotspot and a stable connection especially needed during Teams Call (thats the one which was bothering me earlier). This LPDA antenna bring much more solid connectivity thats what i hope far. you have spent pretty much on antenna, what i observed is that you got LMR400 and you cut it by 5mts. do you have necessary tools to put in connectors after crimping? thats what i am setting back then purchasing a direct cable without connectors. second point is you are keeping router on terrace, how come you are passing internet to ground floor? is it by LAN cable with repeaters or wifi extenders? the post box case i wonder if it protects from temperatures or harsh weather condition? i would advise not to keep router there!

@AkashDev I live in the 10th floor. I have a balcony - no terrace.Antenna is fixed in a pole right in balcony area.

You can easily connect SMA connector provided you have a soldering iron. If you have hot air gun + shrink tubes, then you get a professional look/assured proper fitment. But minimum is a soldering iron requirement with a temp reaching atleast 300 degree Celcius.

Yes, I have all the tools and accessories required as I have a serious hobby in electronics and carpentry. I can guide you if you would need help. 

@Abhi093 Noted and thanks. I take your point.

I have confidence in my work - where I believe I out do full time techies. This antenna thingy is too small  for me compared to certain IoT things I do, where micro errors matter.

Today I got into one more hurdle. I got a call from synergy telecom that they have only one LPDA in stock and it takes 25 more days to restock(basically they import so),If it's ok they will send 1 LPDA.. guys any one of you knows any other dealers?

@darant  There are varius dealers by Synergy  is very resonable compared to others . You can try with one antenna also . keep the external connectoer to the left side input and keep your  default antenna to right side( the input near power button). it works well. I have tested it and didn't find any great reductiion in speed or you can find other vendor by searching india mart ,you need to negotiate they will max come around 1000 Rupees(12dBi)