When Siri first launched you basically got the voice they gave you. In the US it was a lady voice. In the UK it was a man. In later revisions they gave the option to choose between a male and female voice. Either at that same time or in any even further revision Apple gave you the option of choosing the accent. Originally you had one American voice for your iPhone. Now you can select an American, British, or Australian accent in either male or female voices for your English-speaking iPhone.
I’m not sure why however I light the British female voice better. I’ve been using it on my phone ever since. On my iPad to differentiate I use the British male voice. I even now use ways with the British accent voice. I have been doing this long before there was any plan to move overseas.
Now I’m asking myself the question when living in England do I set the voice to be an American female? The dilemmas I ponder while sitting on the subway during my commute. Other people might think about world peace, however I wonder what voice to use on my iPhone.