Hello, tomorrow I'm going to get my first iPhone and intend on jailbreaking it later that day, mainly because I want to tether it. Before I go ahead with the jailbreaking, I'm a bit wary of how things will be when the next firmware version comes out. Will I lose all the saved data from my apps and games whenever I upgrade jailbroken firmware? If so, I'm thinking it might not be worth it to go ahead with the jailbreak.