Blu Studio 7 LTE and 7 II- pre-buy questions

My first post so pardon if in wrong forum - please point me to better forum if applicable.

I am looking for people in Canada who have experience with Blu Studio 7 LTE and/or 7 II. (Some questions below however are universal.)

1) What carrier do you use?

2) Where did you buy the phone?

3) Any problems with GPS - I have read about drift, delay in locking, etc.

4) I have read 1 gig RAM is not enough - can it be bumped up?

5) Can the OS be upgraded from Lollipop 5 and 5.1 which these...

Blu Studio 7 LTE and 7 II- pre-buy questions

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