Always back up your data before updating. And remove your microSD card during the process – heard of a few cases where the update corrupted media files.
After completion, the Bold 9700 will reboot with a progress bar. Do not disconnect. Once the setup wizard appears, restore your backup via BlackBerry Desktop Software. Firmware Change Update on BLACKBERRY Bold 9700
Perhaps the most historically significant firmware change for the Bold 9700 occurred near the end of its lifecycle. As carriers began phasing out 2G networks, the Bold 9700, which relied on these bands for voice calls in many regions, faced extinction. However, the Always back up your data before updating