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A few questions about iPhone 4.

post #1 of 11
Thread Starter 
I'm thinking about getting an iPhone 4 right now and weighing my options.

I will be using T-Mobile so I have to get an unlocked one or get an AT&T one without contract then jailbreak it. I'm on a T-Mobile family plan now so Verizon is not really an option either. I'm fully aware that T-Mobile's US 3G band is not compatible with iPhone's frequency and I can only use EDGE.

I'm entirely new to the whole iPhone thing and I don't know too much about jailbreak and stuff so I have a few questions if anyone can please take some time and answer.

1. Can I use a Jailbroken iPhone 4 on T-Mobile just like other unlocked phones and factory unlocked iPhones? Will the Jailbreak unlock cause any kind of problem?

2. I heard that once you update your firmware, your phone is locked again. Are the iPhone firmware updates mandatory or totally optional?

3. Will Jailbreaking void the warranty on the iPhone 4? How many people actually had problem with their iPhone 4s that required warranty service?

Thanks
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post #2 of 11
1) my wife has an iphone 4 on tmobile, works great jailbroken and unlocked

2) Once the firmware is updated their is a slim chance the dev team will release another unlock as baseband exploits are hard to come by. Also the updates are not mandatory, they only happen when you tell it to update in itunes

3) Technically it does, but restoring the phone wipes the evidence that you were ever jailbroken.
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post #3 of 11
Quote:
Originally Posted by nardox View Post
I'm thinking about getting an iPhone 4 right now and weighing my options.

I will be using T-Mobile so I have to get an unlocked one or get an AT&T one without contract then jailbreak it. I'm on a T-Mobile family plan now so Verizon is not really an option either. I'm fully aware that T-Mobile's US 3G band is not compatible with iPhone's frequency and I can only use EDGE.

I'm entirely new to the whole iPhone thing and I don't know too much about jailbreak and stuff so I have a few questions if anyone can please take some time and answer.

1. Can I use a Jailbroken iPhone 4 on T-Mobile just like other unlocked phones and factory unlocked iPhones? Will the Jailbreak unlock cause any kind of problem?

2. I heard that once you update your firmware, your phone is locked again. Are the iPhone firmware updates mandatory or totally optional?

3. Will Jailbreaking void the warranty on the iPhone 4? How many people actually had problem with their iPhone 4s that required warranty service?

Thanks
okay.
1: BB unlock just allows the phone to allow unofficial sims. doesn't really cause problem to ur phone.

2. Updating your firmware is optional, u can stay on 1.1.4 with the iPhone 2G, apple can't do anything to force u to update. But for iphone 4, if ur phone crashes, u have to restore, u'll have to upgrade to latest allowed firmware. But for a jailbroken phone, no worries about that, it'll all be good and nice with third party tools... =) i can guide u through when the time comes...

3. Jailbreaking voids ur warranty if u bring it to the store when it's jailbroken. Just restore ur firmware and bring u iphone back to apple store to repair. It's just so simple. =)
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post #4 of 11
Quote:
Originally Posted by YtKwonG View Post
okay.
1: BB unlock just allows the phone to allow unofficial sims. doesn't really cause problem to ur phone.

2. Updating your firmware is optional, u can stay on 1.1.4 with the iPhone 2G, apple can't do anything to force u to update. But for iphone 4, if ur phone crashes, u have to restore, u'll have to upgrade to latest allowed firmware. But for a jailbroken phone, no worries about that, it'll all be good and nice with third party tools... =) i can guide u through when the time comes...

3. Jailbreaking voids ur warranty if u bring it to the store when it's jailbroken. Just restore ur firmware and bring u iphone back to apple store to repair. It's just so simple. =)
Unless you have your SHSH's saved, I can restore back to 4.0 if i wanted to.
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post #5 of 11
1. Depends on the baseband you get. If it's 5.13 or below it should work using Ultrasn0w. I have it installed even though I'm on AT&T already, but no problems so far.

2. Optional. It keeps bugging you to update every time you connect but you can disable those messages.

3. Apple says it does. If something breaks, just restore to factory settings and bring it into the Apple store or whatever. They can't tell as far as I know.
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post #6 of 11
Thread Starter 
Thanks for all the response guys

What do you guys think is a good price for a slightly used iPhone 4 16GB? I'm gonna try to find a lightly used one just so I can save some bucks
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post #7 of 11
Depending on capacity and condition, prices can range from $400 - $600 quoting eBay, with all the unlocked and jailbroken ones. Check your local Craigslist, even though I haven't bought from there, I prefer seeing in person that it is an actual iPhone 4 than some chinese knockoff, due to the massive amounts of those floating around lol.

If you can wait, wait until the release of a new iPhone this summer (imminent as they've released a new one each summer) and prices of the 4 will go down. iPhone's usually cost quite a pretty penny.
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post #8 of 11
I agree, 4-600 as long as you can unlock it.
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post #9 of 11
Edit: My bad, I can't read straight i need sleep haha.
Edited by Tom1121 - 2/14/11 at 9:47pm
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post #10 of 11
Quote:
Originally Posted by Tom1121 View Post
Something to think about, iPhone 4 will not be able to access r-mobile 3G network.
he knows about that

but yeah just go with it i think you will be happy
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