Oradan alacağınız iphone'larda Facetime uygulaması olmuyor (ve bildiğim kadarıyla kurulamıyor) başka bir sıkıntısı yok.
İkinci sorunuzun cevabını bilmiyorum.
Edit:
support.apple.comFaceTime isn't available in the United Arab Emirates.
The carrier, not Apple, provides technical support for iPhone in this country or region.
Might include an additional fee or requirement. Contact the carrier for more information.
Carrier doesn't support MMS.
VoLTE is available only on iPhone 6 or later.
Available with iPhone 14, iPhone 13, iPhone SE (3rd generation), and iPhone 12 models. Data plan required. Speeds vary based on site conditions and network provider. For details on 5G support, contact your network provider.
FaceTime may be unavailable if your device originates from this country or region and becomes unlocked or is used in another country or region.