Required utility:
1) Any system explorer or file explorer program (eg. Fexplorer)
Step 1) Open Fexplorer Step
2) Select drive C: or D: depending on the memory in which the Sms messages have been saved.
Step 3) For example u selected c: , Then open \"system\" folder. step
4) Then in \"system\" folder open \"mail\" folder.
step 5) Then in this folder u will see different folders (eg 0010001_s) and certain files (eg 00100000). These files are the actual messages. Browse through every folder and open all files till u get the sms u are looking for.
Step 6) For opening the files don \'t choose options>file>open as it will show format not supported rather choose options>file>hex/text viewer. By selecting the \"Hex/ text viewer\" u ll be able to open and read the deleted SMS message. Note: This will not work if u ve intentionally deleted the contents of The \"mail\" folder.