Which mobile operator are you on? also the outcome may differ from postpaid to prepaid as well.
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for du postpaid connections, you can use their Multi-SIM product. It allows data from the main mobile line to be shared on 5 different devices. You will need to order additional SIM card for each device you want data on. Also each SIM card will have a monthly rental of AED 25 +VAT. You can find more about it here: