Well, you can use your own cell phone in UAE, if it is GSM-compatible & not locked onto a specific carrier.[3]
You do not need a local SIM card to operate your phone in Dubai. However, we suggest you buy a local SIM to avoid international roaming charges.
Tourists can also get a complimentary Tourism SIM card from Du telecom operator to get 1GB of free data for 24 hours.
Later, you can top up at Du kiosks.