Truly open-development, open-source phones like the Nokia N900 will never hit the mainstream in the US because wireless carriers in the country hate the unexpected, writes PCMag's Sascha Segan. The open-source philosophy is all about unexpected, disruptive ideas bubbling upwards, and that drives network planners nuts. So, you get unsatisfactory hybrids like Google Android, which uses some open-source components but locks third-party developers into a crippled Java sandbox. The bottom line is that while Linux the OS, the kernel, and the memory manager are attractive to phone manufacturers, Linux the philosophy — and users banding together ad hoc to create new things — is anathema to wireless carriers.