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IDK about the compatibility, but here’s some advice on the P30 Lite compared to the A50:
PERFORMANCE: the A50 has a more efficient processor than the P30 Lite (10nm Exynos 9610 vs 12nm Kirin 710). Both are decent mid-range processors but I would say the A50 is slightly more powerful and has a better GPU for games. Both come with 6 and 4GB RAM options.
BUILD: Both phones have a plastic back. However, the A50 has a metal (aluminium) frame instead of the P30 Lite’s plastic one.
CAMERA: The P30 Lite has the slight edge here, with a 48MP main camera that uses pixel binning compared to the A50’s 25MP. Both also have a 8MP (ultra-) wide-angle camera and a depth sensor. Neither have OIS. Both take good photos in daylight but the P30 Lite has slightly better detail and performs slightly better in low light. Selfie wise both have 24/25MP selfie cameras.
DISPLAY: The A50 has a 6.4 inch sAMOLED FHD display compared to the P30 Lite’s inferior 6.15 inch FHD LCD display. Both have slim bezels and a waterdrop notch.
SOFTWARE: Samsung’s OneUI is purer than the P30 Lite’s EMUI. Both are decent skins on Android, although most prefer OneUI.