Originally Posted by
Pacus1x Yes the Developer preview is the same for all WP phones.
In the case for carrier official updates, there is basically 2 kinds of updates: The OS (WP8.1) and the firmware update, that update is tailored for a specific WP phone, in Nokia-MS comes in name codes based in colors like Amber, Black and the new one which is Cyan. Those 2 updates comes together and some carriers puts some of their features and bloatware in the firmware, good thing you can uninstall the bloatware.
So to be clear the OS is the same but when carriers get their hold of lets say. The cyan update...they add their features to it such as wifi calling?
Is the visual voicemail feature in the phone app carrier based or is that stock on windows phone. Because it doesn't indicate charges of any kind