⚠️ : Most 82xx models lack Wi-Fi. The 83xx series introduced Wi-Fi.
| Problem | Likely Cause | Solution | | :--- | :--- | :--- | | | Old battery (Li-ion aged) | Replace with C-S2 compatible battery | | Trackball doesn't click | Dirt or wear | Clean with isopropyl alcohol + Q-tip; rotate ball to remove debris | | No network signal | CDMA network shutdown | Phone is effectively an offline device now | | Cannot install apps | BIS dead, App World closed | Sideload .cod/.jad files via USB using javaloader or BBSAK | | White screen / error 507 | OS corrupt | Reload OS via BlackBerry Desktop Manager (if you can find OS 4.5/4.6 for 8250) | | Can't connect to PC | Missing drivers | Use Windows 7 32-bit; install BlackBerry Desktop Software 6.0 or 7.1 | blackberry 8250 curve