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Doggit
Whether an app runs from the SD card, or internal memory, it still needs to run in ram, so getting as much memory as possible is the best trick. The old Mot G 4 is better than the G5, but the G5 will give you the latest operating system, so if you're not after a tope notch camer, just a very good one, then got with the 5. If you want to stretch a few quid over the £200, then one of tescos partners does the samsung J5 for about £215, sim free.
Techradar is pretty good for reviews.
Techradar is pretty good for reviews.