I have a Vodafone SIM card in my iPhone 5S during my traveling for a month in New Zealand. Works great and provides a hotspot for my other devices. This phone is off the ATT grid since I don't use it in the US. I do have the ATT sim that I used to use on the phone. With the Vodafone sim or with the old ATT SIM card in the phone, I get ALL Siri responses in Arabic (voice and print). I'm guessing when I return to the US in 2 weeks, I can "wipe" the phone and then restore it to the last back to the backup I made before leaving the US. Wondering if that is correct? Also wondering if I some how got the phone hacked to cause this problem? Any response would be welcome.