I have recieved the Nokia 6300 4G... and I do agree, KaiOS is not very efficient. I do enjoy calling with this phone, though, as my iphone has the shittiest mic ever.
New and Original Nokia 6300 4G Wifi Mobile Phone Multilingual Dual SIM 2.4 Inch KaiOS FM Radio Bluetooth Feature Mobile Phone - AliExpress
New and Original Nokia 6300 4G KaiOS Wifi Feature Phone Multilingual Dual SIM 2.4" FM Radio Bluetooth Rugged Push-button Phone - AliExpress
Exclusive: Nokia 6300 4G & Nokia 8000 4G major specs, KaiOS, color options & other details - Nokiapoweruser
Nokia 6300 and Nokia 8000 Feature Phone Remake Launched with 4G, KaiOS
Nokia 6300 4G TA-1324 4GB GSM Unlocked Phone Dual Sim - Powder White - Walmart.com
HMD lança celulares básicos Nokia 6300 e 8000, ambos com 4G e sistema KaiOS - Canaltech
Nokia 6300 4G WhatsApp on two phones? : r/dumbphones