If you have taken backup of the deleted photos, of course you can recover them from backup. If not, you need a third-party Android data recovery program to get them back before they are overwritten by new data. It's not difficult, just search the details online.
That is a great question, ROBSTO74. If you had your pictures backed up to some sort of Cloud Service, all of your pictures should be there. We can see if we can help you by getting some more details. What kind of phone do you have? Do you have Cloud Services? If so, which one do you use?
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