NCIS would not investigate an airplane crash. The National Transportation Safety Board (NTSB) has both the jurisdiction and expertise to do so.
Radio signals being transmitted cannot be traced to where they are being received. Using special equipment, you can find the location of the transmission, not the location of the reception.
Cell phones use RF waves, not microwaves.
A passenger would not survive a plane crash such as the one shown. On the slim chance they did survive, they would not be able to walk as was shown.
NCIS co-workers would not interview potential hires. This would be done via the agency's personnel department.
Every mobile device does not automatically connect to "the cloud". Doing so is optional.
The Department of Justice (DOJ) could not relocate an NCIS office, nor would it have any say on hiring. The NCIS is under the Department of the Navy, not the DOJ. The DOJ oversees several federal law enforcement agencies, such as the FBI, Marshal's service, and DEA, but military law enforcement is not among them.