Nubia Z50 Ultra will be unveiled in China on March 7 by the ZTE-owned smartphone brand. Ahead of the formal debut, the handset has been allegedly spotted on the Geekbench benchmarking website, hinting at its key specifications. The upcoming Nubia Z50 Ultra has appeared with model number Nubia NX712J. It could run on Android 13 and could be powered by a Snapdragon 8 Gen 2 SoC. The Geekbench listing also suggests up to…