Nope. That is the purpose of the Profile.
DEP makes it so that the iDevices bought by the company enrolled in the DEP always apply company policy via a profile (using a MDM server) when you set it up.
The only way to change the restrictions is to ask the Swisscom MDM server administrators - they can remotely change and manage anything. I'm not familiar with Mobileiron (the MDM server supplier) - maybe he can try logging into https://mds01.swisscom.ch/login.html with his company credentials? But the chance of him being able to manage the device in this way is very slim.
My condolences to the Swisscom employess if this madness is standard. There's definitely no need to cripple a phone in this way unless one is working for a 3-letter agency or something.