About the problem of iPhone4s upgrade with locks

iuni will send you a tutorial to upgrade ios7, no developer required:

Preparations: 1. Install the latest version of iTunes, 2. Install the iOS7 firmware of the corresponding device, Note: If your firmware is in DMG format, please see here How to use DMG format firmware.

3. In order to ensure that the data is not lost, use iTunes to back up the device first

Right-click on the device name in the list and select "Backup".

Upgrade tutorial (take itouch as an example, this upgrade method is common to iPhone, etc.):

1. Open iTunes and connect the device to the computer through the data cable

2. Press and hold the Shift key on your keyboard (press and hold the Option key on Mac), and click the "Recover" button with the left mouse button

4. Select "Update (Restore)" to start the firmware upgrade

5. In about three minutes, our device has been updated to ios7 system, the last step is to restore the backup data to the new system, right-click the name of the device, and select "Restore from backup.".”：

Select the time corresponding to the backup to restore.

6. Wait for the recovery backup to be completed, so far, we will upgrade to ios7 firmware after retaining all the data. When recovering data, all jailbreak-related content will be invalidated, and the genuine content will be retained, including your **, contacts, and text messages.

1, if you want to upgrade with a lock, you must protect the baseband upgrade, if the baseband is too high, the card can not be unlocked 2, jailbreak is to see the firmware version of the mobile phone, and it doesn't matter if there is a lock or not3, the lock refers to the network signal of the locked operator, that is, you plug in the card to show no signal, can not be unlocked can only be used as touch.

4, if you haven't bought it and think about upgrading the jailbreak and spending money, why don't you just buy the unlocked one and upgrade it yourself? The amount of money invested in each upgrade is enough to offset the difference between locked and unlocked.

5. Novices are recommended to buy unlocked without locks, and the unlocked ones with locks are not very stable, and the signals without locks are very general, not to mention the locked.

If there is a locked version, you need to put a card on the top and bottom, which can be upgraded, but the card must be compatible.

The US version has a locked version of the iPhone4S unlock, which can be carried out by following the steps below:

1. Turn on the machine without inserting the card, and wait for the machine to enter the state to be activated.

2. Press the home button to bring up the emergency call interface, enter 112, and click to call.

3. Put the thumbs of both hands at the end of the screen at the end of the end of the call button on standby, and when the mobile phone is connected to 112 and there is a voice prompt, the right thumb clicks on the right side of the end call button, and then the left thumb quickly follows the left side of the end call button, and then the right hand continues to click, the left hand continues to click, and the two hands click alternately, the screen will appear: a, call - end - call - end - call failed - wait for more than 3 seconds, click cancel --- enter the desktop.

b, call-end-call-end--black screen but the call is through--wait for more than 3 seconds, click the home button--exit black screen--call hold-enter the desktop.

c, call-end-call-end--black screen but the call is on--wait for more than 3 seconds, click the home button is invalid--press and hold the power button--pop up the shutdown button--click cancel-exit the black screen--call hold-enter the desktop.

You can use a sticker. It's all available online.

About the US version of the iphone4s has a lock version of the problem:

1. You can choose any locked version, unlock it with a card, and unlock it to be used all over the world.

2. The three networks and the two networks are mainly for your mobile phone operator, and the three networks are absolutely OK.

3. The mobile phone comes with Chinese.

4. Problems that should also be paid attention to:

1. Since there is a locked version, you need to install a card (generally a GPP card), no need for corresponding software to support, and there is no need to jailbreak the mobile phone, the GPP card chip part is very small, the power consumption of the whole core is very low, the standby battery life of the whole machine is basically not affected, and the power consumption problem can be basically ignored.

Second, the telecom card number seems to have a signal problem with the American version of the lock, but it also depends on the character, if you are a mobile number, it is absolutely OK.

3. After upgrading the firmware, you will find that there is no signal at all, the SIM prompt is not supported, and you need to unlock it to have a signal. Therefore, if you have a locked phone, you basically choose to jailbreak to the perfect version.

Summary: After the American version of the lock machine is installed with a card sticker, it is no different from other versions of the machine, cost-effective, and it is worth buying now.

It can be arbitrary, too, but it is more troublesome to unlock the lock, and it is recommended that the landlord should buy no lock.

Unlock iPhone4S Process:

2.To unlock iPhone4S, you need to turn on Feixin mode;

3.Remove the SIM card of AT&T and insert the card of T-Mobile;

4.Make sure the wifi is turned off (if it is on, please ignore all existing Wi-Fi networks and avoid automatic connection);

Turn off the airplane mode and wait for the signal;

6.When the iPhone 4S activation message appears, the Edge network will appear in the upper left corner of the screen (that is, an "E" sign);

7.To unlock the iPhone 4S, you need to wait for 20-30 seconds before turning it off;

8.After powering on, wait for the iPhone4S activation message to appear;

9.When you see a signal in the upper left corner of your iPhone4S, tap "Use Emergency Dialing";

10.Take out the SIM card, and the activation information of the iPhone4s will appear again when you want to unlock it;

11.Insert the SIM card on the iPhone 4S phone that needs to be unlocked;

12.To unlock iPhone4s, Note: Every time you unlock your iPhone4s and reset your device, you need to do it all over again.

Also, this method also supports iPhone 3GS and iPhone 4 unlocking.

The American version is all locked. It's all a built-in card machine. Cannot be upgraded. There will be no signal. If you upgrade, you can't save the baseband. If you upgrade, you have to stick a piece of upgrade