Can I use the device purchased from Overseas?

Can I use the device purchased from Overseas?

You can use the current device by inserting SIM if it is the factory unlocked device. 
* Applicable to: device released after July 2008. 
**The device manufactured by US only like Motorola, blackberry are not applicable**

But you need to submit, 
      1. Model name 
      2. Serial number 
      3. IMEI
      4. MAC WIFI address