A member mentioned SEO. If you do not know SEO that good or good enough to give real advice that will help people, don't write about SEO.
If you blog is all about technology then keep it to this niche only. Tons of people have smartphones and why not blog about how to protect your phone from other people..
Let's say you leave your phone on the table and you have stuff on your phone only you should see.. If you don't have a password on the phone, anyone can read your personal information. If you loose your phone, all your personal information and pictures including access to your email accounts if you have access on your phone is up for that thief to use.
Blog about how to safeguard smartphones and go into details.
Blog about the pro's and cons of upgrading your IOS software when a new update comes out. Keep in mind some people have issues after upgrading because they have out-dated apps.
Hope I gave you some idea's to blog about. Write catchy titles with a keyword phrase in the title.