Only the iPad Wifi + 3G Model needs a Sim.
If you have a 3G iPad, you will need a SIM card in every country. Wi-Fi only iPads don't have a sim card slot.
I have an ipad 3g and it has a Sim card, i don't know if it is a micro sim, it looks just like the Sim cardd in an iphone. There are two kinds of ipad and the ipad 3g does have one and the ipad wifi does not.
No it is different ipad has micro sim iphone does not and you have to activate it on the one you bought it with.
NO
At a Store that sells Sim's for iPad.Or service provider.
Yes. That is where the 3G account and provider information is stored. Micro sim is for ipad or mobile?
No. There's an iPad WiFi and an iPad WiFi + Cellular. The iPad WiFi will only be able to access the internet when you're within range of a WiFi network. The iPad WiFi + Cellular is able to access the internet within range of WiFi and on a 3G network. To access the 3G network you will however have to use an active simcard.
iPad models that support data connectivity (3G, 4G LTE) have a SIM card. Try this link for some useful informationCan an iPad SIM card be removed
No, the iPad with 3G it is not SIM-Unlocked for multiple carriers, it is locked to AT&T. You may use Spirit jailbreak to unlock it and do as you wish with SIM unlock and so forth.
This depends. First off, it would need to be an AT&T model, as Verizon models do not use a SIM card. Also, it depends on the UK carrier. Most would be compatible with AT&T's network, so yes, you should be able to use a US iPad 2 with a UK SIM. Although, take note that the iPad uses a microSIM, so the UK SIM card will have to be cut down to fit into the iPad.
No if you have the internet version you can just use the mobile network via a micro sim card.
Push the SIM removal tool into the iPad on a vertical angle. The SIM tray should pop out, then pull it completely. A diagram can be found here: http://support.apple.com/kb/HT5163