Launched with 6 GB of memory and 128 GB of internal storage space, the Oppo A9 has just received a new configuration. The 4 GB/128 GB Oppo A9 will hit the Chinese market on May 10, slightly cheaper than its aforementioned sibling. However, the color choices remain the same — green, white, and purple.
https://www.notebookcheck.net/Oppo-A9-with-4-GB-RAM-now-official-in-China.420190.0.html