Every Nokia smartphone user has encountered a situation when, while trying to install a new program with the.sis extension, the message "Certificate expired" appears on the screen. To resolve this issue, you need to obtain a security certificate for the device.
Instructions
Step 1
Disable certificate checking in Application Manager. Turn on your smartphone and open the "Menu" section, then select "Settings" and "Applications". Go to the "Program Settings" section and disable the "Certificate Verification" item. If this method did not help you install the required application on your smartphone, then you need to connect a personal security certificate to sign the program.
Step 2
Please use your UCWEB smartphone browser as it will save the certificate to the device while other browsers try to open it. If your device does not have this application, then first download and install it.
Step 3
Go to https://cer.s603rd.cn/ in your smartphone browser. Determine the IMEI code of your smartphone, which must be entered in the appropriate line on the site. To do this, enter the combination * # 06 # directly into the device. Rewrite 15 numbers of the code to the site in order. Next, enter the verification code and click the Submit button. As a result, a request to connect a security certificate will be sent.
Step 4
Wait about 12 hours and go to https://cer.s603rd.cn/ again, enter the IMEI code and click the Submit button. If the certificate for your smartphone is ready, a download button will appear. Save the certificate on your device. Close your browser. Find the downloaded file in the UCDownloaded folder and run it.
Step 5
You can also connect the certificate through a computer. To do this, use the Internet Explorer browser and download the required file in the same way. Transfer it to your smartphone and install.
