The phrase "upgrade process" refers to the steps or actions taken to improve or enhance something, such as technology, software, or a system, to a newer or better version. Full definition
This process should initiate the latest software upgrade process. (gadgetian.com)
Upgraded processing power also means better graphics, improved textures and other such improvements. (dualshockers.com)
NOTE: This tutorial was created on the assumption that you the reader knows absolutely nothing about the BlackBerry OS upgrade process. (patchworkoftips.com)