Hi,
All this sim can be used as 2nd sim only because of offers, It provides good offers especially for internet and for prepaid or post paid plans but main where it lacks is due to the signal connection.
We can use especially for the data usage it is good to use especially for the internet.
I like the offers especially full talk time as well. I recommend every one to use as the 2nd sim option where we can use data packs with very reasonable rates.