Oppo A57 4G
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Most of the OPPO A57 4G page is replacement screens. BQ7 lists LCD assemblies with and without a frame, some shared with the A57 5G and A77 5G, and there are AMPLUS and REFURB LCD and digitizer replacements that are also listed for the A38 4G and A18.
The battery is an AMPLUS 4880mAh replacement, listed for the A57 4G together with the A77, A57s and A58.