The bonus is automatically posted to all new sims.
Yes the offer is valid on new sims only.
You can use any/all offers with this offer.
The offer can be subscribed multiple times. On re-subscribing, additional minutes will be added to the existing minutes.
You can dial *345*33# to migrate to djuice, free of cost. After coming on djuice, you can avail the offer by simply dialing *345*700#