Physically remove the battery for 30 seconds after first boot. This clears residual NV (non-volatile) memory and stabilizes the new firmware.
| Firmware Version | Radio Stack | Battery Life | Stability | Best For | |----------------|-------------|--------------|-----------|-----------| | 7.1.0.1033 (bundled) | P5.1.0.402 | 6 hours talk | High | Default carrier | | 7.1.0.1098 (Asia) | P5.1.0.427 | 7.5 hours talk | Very High | Multilingual support | | 7.1.0.1149 (Europe) | P5.1.0.455 | 8 hours talk | Excellent | Maximum battery | | 7.1.0.1375 (LATAM) | P5.1.0.502 | 6 hours talk | Medium | Spanish/Portuguese | Firmware Change Update on BLACKBERRY 9220 Curve