The only problem I see with openness is that the GSM network is secure only as long as all the devices are in full control of operators. This should change ASAP

The only problem I see with openness is that the GSM network is secure only as long as all the devices are in full control of operators. This should change ASAP because GSM sniffers/injectors are already in the hands of hackers that are starting to figure very well how the GSM network works and the vulnerabilities it has (not only about encryption algorithms in use, but think to all the TCP/IP stack bugs of the latest 20 years). That said an open market where the user can upgrade to the next version of Android, or to a custom version of android, and generally, when the vendor of the OS is not necessarily the same as the hardware vendor is a good thing.