I also chose to change mobile numbers. I had a Beverly Hills area code (310) from my Los Angeles days and have now changed to a San Francisco Bay Area area code (415). After all, I do feel more like a hipster from the Bay Area than a high society media mogul from Beverly Hills!
My old number will continue to work until just before the end of this month. My new number is already working.
I actually think I’ll miss my old 310 number. It was easy for me to remember!