If you are transmitting sensitive information, which would you use, cellular or wifi?
Use additional encryption either way.
It’s kinda like asking if you should wear gloves or a hat when driving to the mall in cold weather, but then the car runs out of gas on the way because you forgot to check the gauge.
The actual transmission of data should absolutely be secured, and you do that via a variety of methods so either cellular or wifi doesn’t really matter. However the more major hacking risk is on the origin and destination systems, not during transmission. All the major hacks you hear about are not from data captured during transmission, they’re from hackers gaining access to the system where the data resides.
Anyway, to answer the question - if the device is a cellphone or tablet then I don’t care if it’s on cellular or wifi so long as the device is under corporate MDM (mobile device management) and using vpn. Our corporate security policy prohibits storing sensitive data on mobile devices not under MDM, but we don’t care if data is transmitted via cellular or wifi because the endpoints are secured either way and the data itself is encrypted during transmission.
What sort of sensitive info? If this were govt or trade secrets, I don’t think you’d need to ask on a college forum site. As amomander notes, your employer would have a policy.
And sure, whether Wi-Fi or cell data, I’d be cautious in some public places. Or in sending to friends, who could have their own issues.
It matters what this sensitive info is. In general, what you type doesn’t travel across the network as written, but in pieces.
If this is for a government or corporation, you should follow their IT policies, whatever they may be. For email or other messaging services, there are various end to end encryption products. You could use VPNs. Some of the technical information in this thread is wrong, but that’s in the weeds. For personal use, the bigger issue is not having an exaggerated sense of risk.