Any ideas on this fruit, tastes like guava.size of a plum.leaves not like guava...would love to know what it is.

Been told it is called "Farang Boran" in Thai which means old fashion guava...but would still like to know more..

Whatever it is, I'm pretty sure it isn't feijoa. I'm growing feijoa in Laos (no fruit yet) and it's leaves look very different.