No, they can't. Because the SMS recovery is a complicated thing even if you have a smartphone. Once the SMS messages are deleted, then there is no possible way to recover them unless there was a backup performed.
Make copies of SIM cards without the PIN.
It can help you recover files from SD memory cards.
This software allows you to recover lost files from a USB flash drive.
No, they can't. Because the SMS recovery is a complicated thing even if you have a smartphone. Once the SMS messages are deleted, then there is no possible way to recover them unless there was a backup performed.