SIM card can be despose and you can throw away the SIM card.
MiFi, Phones and GPS will be return to our guy before your flight back.
We know the date you are leaving ISRAEL, we just need your flight number, we will ask for it while you are picking up your rental device and will meet you 3 hours before departure in Ben Gurion Airport.
At the pickup point on your arrival date to Israel we will ask you for your Credit card details just in case of a device lose/ damage/ stolen/ fail to return it
For those scenarios we will charge you for the market price of each device as mentioned on http://www.zap.co.il