For users who want a good budget selfie phone, the A57 is a good option.
Full article: The analytics of product-design requirements using dynamic internet data: application to Chinese smartphone market
Oppo Mobile Phone: 10 Best Oppo Mobile Phones in 2024 - Get Unmatched Performance at Unbeatable Value for Money - The Economic Times
OPPO A57 OPPO Pakistan
OPPO A57 Review: Selfie Expert Goes Compact
Oppo A57 2022 vs Oppo A55 - Detailed Comparison, Camera Test
Oppo: Oppo A57 review: Scores big on camera performance, style - The Economic Times
Oppo A57 Review Camera, Specs, Price in India, and More
Oppo A37 price in kenya features & review
If electronics are getting cheaper, why are cell phones so expensive? - Quora
With a microscopic camera, comes microscopic disappointments – Oppo F21 Pro
Is the Itel P55 5G phone worth buying? - Quora
OPPO A57 Full Review