I'd assume, if done legitimately, that the instrument contains cal points across all the bandwidths it could be used and doesn't need redone. On our Rigol scopes we don't offer a legitimate after sale BW upgrade. On units like that you may be taking your chances a bit more. If I were going to upgrade the BW on the sly I'd definitely run whatever auto-cal sequence I could as well as a few tests.
What are the engineering and design challenges in creating successful IoT devices? These devices are usually small, resource-constrained electronics designed to sense, collect, send, and/or interpret data. Some of the devices need to be smart enough to act upon data in real time, 24/7. Specifically the guests will discuss sensors, security, and lessons from IoT deployments.