1. Unzip the authorization certificate you found and directly place it on the memory card (anywhere else works too, this is just for convenience).
2. In the built-in browser, enter the file path file:///e:/ [delete any spaces between / and /] (here is the certificate name, that is, the name of the certificate obtained after unzipping, with .cer or .der extension. Since the phone cannot recognize it, you need to add it yourself, usually .der or .cer. For example: file:///e:/PCA1ss_v4.509.der).
3. At this point, it will prompt "Authorization certificate received," choose "Store," and it will immediately indicate "Certificate stored."
4. After "Store," click Settings > User Certificates to see if all certificates have returned. (Then restart the phone).
Done, that's it, OK.
Importing on a dumbphone is convenient and practical. This avoids some users not knowing how to use MMMB.
Test models: 3208C, theoretically supports all S40V5V6 phones.
Attachments: optional.
Theoretically, user certificates can also be imported in this way, but the user certificate has both .sys and .der parts; only .der cannot be used… if interested, you can try.
