Jun 18 2014 | 4:30 pm EDT
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Unlocked SIM-lock or unlocked bootloader. Two totally different things.
Originally Posted by tinker1234
Yes, in either case.
Can people do that for themselves?
Well ... not according to the manufacturers (in either case), but I can't remember anyone being prosecuted for unlocking either one.
Unlocking the SIM lock lets you use the phone with any GSM carrier in your region (or the world - the phone is still region-locked).
Does it let you use your phone with any carrier of your choosing?
When you open an account with the carrier, you'll get one of their SIM cards, if they're a GSM carrier. (If they're a CDMA carrier, the phone doesn't use a SIM card for network connection.)
Do you need to get a SIM card to go to any carrier of your choosing?
Subscriber Identity Module - basically the part of the phone that says "this is my phone number".
What is a SIM card, some kind of chip that identifies your phone so the service can find it?
To get administrative access to the operating system. Or to modify the phone so that you can.
What does it mean to root your phone?
The right way? Most people can't. The way most people do it (with a program that does it for them)? Yes.
Can most people do that for themselves with some instructions?
You can run apps that need root. You can freeze or uninstall system apps. (You can also turn the phone into a paper weight, so weigh the advantages with the disadvantage.)
What is the advantage of doing so?
There's one single little command that can remove everything but the hardware from the phone. You can write to, or corrupt, a file the phone needs. (Or the rooting program may be poorly written and damage the phone.) IOW, you can turn the phone into an expensive paper weight. And you won't be able to update the phone. Updates assume that a rooted phone may not be what it appears to be, and updating it would cause it to stop working, so the update stops. (There are also some apps that won't run on rooted phones, for security purposes.) Oh, and you immediately void the warranty, even if the phone works and, say, the earphone jack breaks (which has absolutely nothing to do with rooting).
What are the disadvantages of doing so?