Not necessarily. There are mobile signing tools, and signing on a computer is also very simple.

1. In the standby mode of your mobile phone, enter *#06#. The string of numbers that appears on the screen is your mobile phone serial number.

2. Log in to the Mobile Home website, register as a user and click Symbian Signature at the top of the page

3. Then click Apply for Certificate, he will ask you to submit the serial number and submit After getting the certificate, just wait for a while

4. When you need to sign the software, log in to Mobile Home or click Symbian Signature. At this time, just choose online signature. Just install the signed software directly.

Follow my step-by-step instructions, it’s very simple.