The cost of the modem is 800 QR.
Plans range from 100 qr / month for 1gb
to 300 qr / month for 5 gb......

BUT USE EXTREME CAUTION WHEN USING THE MODEM OVERSEAS...

Yes it will work fine, but when I downloaded some windows updates when I was in hong Kong earlier this year , my QTEl bill for the month was

25,000 QR yes, thats right, twenty five THOUSAND riyals for using 2.5 hrs of internet time overseas.......in one month

You think I was happy ?