UPDATE: 1/6/2016: Recent developments have resulted in a way to downgrade 10.3< systems. That being said, these exploits are experimental and errors made during the downgrade process may brick your system. For a guide on how to do this click here . You do this at your own risk!The US Standard N3DS (non-XL) comes with a minimum firmware version of 9.5. If you are looking for an exploitable console stay away from these.At this point most systems will have a firmware above 9.2. You should work off the assumption that any serial number not on this list will be above 9.2.