I've let the installer run for about 4 hours, but the installation of Ubuntu 13.04 32 bits it's still stuck in this message:
Configuring bcmwl-kernel-source
Now, I'm stuck with my phone until this is solved.
Computer specs: Acer Aspire 3610 - 2GB DDR2 - Intel Celeron M processor 1.5ghz - Intel 915GM x86/MMX/SSE2