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Download your new blogger template from any free blogger template provider website to your computer. Lot of website are providing free blogger template. If the template is contained in a zip file, you have extracted the XML template from zip.
1. First go to Blogspot.com.
2. Login to your Blogger Dashboard.
3. Click on "Template" From The Blogger Menu
4. Now Click on "Backup / Restore" Button.
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6. Click on “Upload”.
7. If you see a warning like following:
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9. Now You are done.