As you asked I am RRB Secunderabad Duplicate Call Letter is available for download on its official side , here I am telling process to get it :

Go to RRB Secunderabad official website

Check Find the "Admit Card" Section & Click on

By click there you will land on call latter page which look like given below image



Enter the your Registration No. & DOB (Date of Birth)

And Submit Button Click on

After Download Admit Card/ Call Letter

After Take a print out for future use

For more info you can do contact here :

General Information (Recruitment)
Chairman

Railway Recruitment Board,

South Lallaguda,

Secunderabad - 500017.

Tel: +91 40-27789546, +91 40-27821663

rrbsc@yahoo.com

Working Days: Monday to Friday

Timings: 09:45 AM to 05:45 PM