Yes, Oppo F11 has dual 4G sim support. You can use 2 sim cards on 4G networks at the same time without any trouble.
Yes, Oppo F11 comes with a hybrid sim slot but it also has 128GB internal storage and OTG support.
Yes, Oppo F11 does have FM radio support.
No. Oppo F11 does not have the IR blaster sensor support.
Yes, Oppo F11 does have support for the fast charging. The mobile comes with VOOC 3.0 enabled the fast charger. It charges almost 20% faster than the regular fast chargers available in other mobile phones.