OPPO a37 is a great phone it has got huge specifications and very good camera clarity of 13mp rear and 5mp real camera and It has good battery backup and it has 2sim card slot and it has 16gb rom
And 2gb ram it has expandable up to 32gb memory of storage and 4g volte high speed internet browsing with HD screen and quad processor for multi tasking so go on with Oppo a37