Is it normal for Nokia E63 to blink when opening the menu and selecting text by SMS?

This is not normal! There are several reasons for this:

1. Maybe your battery voltage is unstable. Let's see if you are using the original battery. This happens sometimes with Scud batteries.

2. Has your mobile phone not been cleaned for a long time? Try installing a netqin mobile guard to delete the junk software of the mobile phone system?

3. Is the mobile phone out of memory? Sometimes this may happen when the phone is out of memory.

4. Is there too much software in the mobile phone? Try to delete some uncommon software.

5. Is the version of your mobile phone's own system the latest? Is it a system bug? Take a closer look at the mobile phone system.

6. If none of the above problems exist, just restart and try. It should be solved!