iPhone 7 Plus and Ikea Trådfri or Samsung UHD Smart TV (2016)

Hi,

I have trouble connecting my iPhone 7 Plus (iOS 11.1.1) to Ikea TRÅDFRI hub or using SmartView iOS app to control my UHD TV.

Connecting to TRÅDFRI shows that device cannot be found, also SmartView app cannot find TV even it’s connected to same network.

However, my daughters iPhone 5S (same iOS) on same WiFi can connect to TRÅDFRI and SmartView and it works fine. Also, my iPad Air 2 with same iOS and on same wifi can also work fine with both of remote devices.

I’ve tried reseting my iPhone to ‘factory settings’, reset network settings, singing off iCloud and trying to connect, bunch of stuff but just can’t get it to work.

Any suggestions?