A few usage questions about iphone 3GS 4 1 version .

3 The way of the game** is unknown, and the format is unknown, so it is difficult to judge. One thing is for sure, if you want to delete it, press and hold the icon on your phone until it shakes, there will be a small cross on the icon, just click it. I don't know what means you used to say that you can't delete it?

Again: I don't know if you cracked it or not, you bought it back and didn't do anything or what? The landlord provided too little information... Excuse me.

That's it.

2. Go to the store and try to change potatoes or something, I'm no problem here. Youku can be put.

There is a problem with the installation, and sometimes this happens. And sometimes there is a problem that after the installation is successful, it will automatically exit as soon as it runs. 91 installed Dongdong, removed not clean.

91 is prone to cause white apples. It is not recommended to use 91, or software games in IPA suffix format, add them to the iTunes database, and synchronize them. At present, all forums are provided in IPA format, and only 91 are PXL.

1.If you can't help it, just use iTunes, and it won't conflict anyway.

2.Youku should be usable, Youku is free software, you don't need to use 91 times, go to iTunes to try the next one.

Sometimes this happens, if you can't delete it in your iPhone, link to the computer, go to 91's program management to see, if not, the next software to clean up junk files, 91 has the next, you try to see if it helps.

Then you can upgrade back to the original version, and the general software operation will not damage the hardware, and if it doesn't work, just get it and buy a mobile phone, and let him help you upgrade a suitable version, and he must know.

Two possibilities to upgrade the firmware, 1When upgrading the iPhone firmware, it is only a firmware version upgrade, 2When you upgrade the iPhone firmware, not only the version is upgraded, but the baseband is also upgraded. (Very important).

To prevent it from becoming a brick, it is best to first back up the firmware version you have jailbroken, and then when the iTunes firmware is upgraded in the future, if you upgrade the higher version by mistake, you can use the firmware backup to down, but if you upgrade the firmware version of the mobile phone at the same time, you will also upgrade the baseband, then congratulations, it has become a brick. Personally, I recommend that you don't rush to upgrade your phone's firmware if you don't have to.

If suddenly one day your phone is connected to the computer, iTunes shows "there is a new mobile phone version that needs to be updated", you don't pay attention to him, upgrade or not upgrade is up to you. ）

If it becomes a brick, it is the baseband that goes up, then you can only find a professional place to disassemble the "crash landing" to lower the baseband firmware version of the mobile phone, but it can not be upgraded in the future, it can only be the version after the forced landing. Although it can still be used, it hurts a lot to take it apart, right?

I can't back up shsh now, it's closed!

There are many possibilities for bricking, and the landlord will not change bricks just by answering ** and sending text messages!

It is possible to become bricked when installing cracked software and updating cydia sources, so be cautious!

Don't be cheap when connecting iTunes, just click on something "update" and "restore"!

It's okay to be careful with the American version.,I'm using the American version now.,Everything is normal!