Ajay,
If you want to investigate our new libraries that support mbed 5, you should take a look at our Dot-Examples program which contains a number of example applications for the mDot and xDot.
https://developer.mbed.org/teams/MultiTech/code/Dot-Examples/
If you want to try out the latest libmDot in mbed 2 instead, you can use the mDot_LoRa_Sleep_Example.
https://developer.mbed.org/teams/MultiTech/code/mDot_LoRa_Sleep_Example/.
In both cases, sleep mode on the mDot should get current consumption into the ~50uA range.
Cheers,
Mike