Both smartphones will come with 60x zoom, have good processing speed and two selfie cameras.
The rumoured Adreno 650 GPU could offer a 20 percent boost in performance over the Adreno 640.
Realme had announced its very first flagship smartphone called the Realme X2 Pro in China on 15 October.
Other specs listed for the Realme device include a 6.55-inch display with FHD+ resolution.
Samsung Galaxy A90 5G houses a 4,500 mAh battery that supports 25 W rapid charging.
The bezel-less smartphone also gets top-notch hardware with a Snapdragon 855+ inside.
The Samsung Galaxy Note 10 and Note 10 Plus will be announced in New York on 7 August.
Nubia Red Magic 3 comes with a customisable air trigger, an in-built cooling fan and a 90 Hz display.
The report states that Sony could make use rails to help expand the display on both sides.
There will be only 3,000 units of this limited edition smartphone sold globally, as per Asus.
The Redmi K20 is seen to sport a red coloured finish with yellowish and purplish overtones.
The upcoming Redmi flagship will also be part of the Android Q beta program.
The company had earlier squashed rumours of the device being called Redmi X.
Surprisingly the OnePlus 7 Pro actually has a smaller 4,000 mAh battery that the OnePlus 7.
The upcoming Redmi flagship could be unveiled on 14 May, the same day as the launch of the OnePlus 7.
The Nubia Red Magic 3 has 6.65-inch FHD+ AMOLED panel that has a 90Hz refresh rate.
The upcoming Redmi phone could be the flagship device with a Snapdragon 855 SoC and triple rear cameras.
Oppo Reno sports a bezel-less display with a unique pop-out camera resembling a shark fin.
The device is also shown to have a triple-camera setup which would make it a first for Redmi phones
Galaxy S10 5G was revealed at the Samsung Unpacked event in San Francisco on 20 February.