Free wifi (maxpot), just open your browser to validate. Water bottle is cheaper at duty free shop than the coffee shops. Immigration queue quite long after 10pm till morning.
If you looking a calm place to sleep lead to gates 141-143. There is a room covered by carpet and many electronic plugs. You can relax on the floor spent you time in internet.
DXB free wifi is indeed WOW. Never seen airportfree wifi this slow! Long queues for toilets as well and very crowded, but hey, at least they have the title "one of busiest airports in the wotld"...
Bypass the ginormous "passport control" lines by with an "e-gate" card, which you get at the e-gate office in T1, 2nd floor. Take 15 mins. Non-UAE OK. 200 AED. Open 24h?
The worst! Too crowded. You cannot find a decent place to sit at any cafe or in the waiting areas! Even to go to the toilet, I had to wait an hour until I got on the plane, due to too long lane to WCs
Do not rent a car prior your visit if you are landing on Terminal 2. Almost all car rental companies are located in Terminal 1. It costs 40 AED from Terminal 2 to Terminal 1 by cab.
When waiting in line for a taxi, insist on using regular taxis. Sometimes the coordinator might direct to use more expensive options (limousine or pink taxis). Refuse if you don't want to pay extra.
Free wifi for a short period.Terminal 3 has restaurants,if you want find out more on T2 which has done more options.Limited charging stations for your devices.Good architecture.
If you're lucky enough to be traveling First Class on Emirates, prepare yourself to be amazed by the First ClassLounge at Terminal 3 (and disappointed by every other airport lounge in the world).