于 4月23号向美国ATT公司发邮件解锁，内容如下
I am writing from china and I have an iPhone 4 which is locked by AT
Since I live in china, I don't have an AT&T account or AT&T wireless number.
I am willing to request an unlock code via Email
My Full name: XXXX XXXX
Wireless Number: +86136xxxxxxxx
iPhone 4 IMEI No: 012658003093482
E-mail:xxxxxxxxxxxxxxxxxxxx
Thank You in Advance
26日得到回复如下
Dear XXXXXXXXXXXX
Thank you for contacting AT&T Customer Care. Regretfully, we are unable to process your request to unlock your iPhone 4S with the IMEI ending in 3482.
We are unable to complete your request at this time due to the following reason:
The unlock code for this device is unavailable due to security restrictions based on the device's history. You may want to return the device and/or provide feedback to the seller.
Please note, if you are traveling internationally, iPhone 4S is a quad-band phone and will work in many countries across the globe. Please visit /learn/international/ for information on traveling abroad with iPhone.
For questions regarding AT&T’s wireless service and iPhone 4 please contact AT&T Customer Care at +1916-843-4685.
We thank you for your continued business.
Thank you for contacting AT&T Mobility. We appreciate your business
顺便问问封釉们，有过期的美版解锁成功的么？我朋友还有一台是5K开头的销售也是T1，能不能解锁
网友回复================================
和我的回复一样 同问
网友回复================================
和出没出包应该没有关系，主要是安全原因，有没有挂失等等。可在发邮件问问吧。
网友回复================================
引用 朋友的机器，串号为??012658003093482??美版T1
于 4月23号向美国ATT公司发邮件解锁，内容如下
I am writing from china and I have an iPhone 4 which is locked by AT
.......
5k开头的att版本4已经是无锁了吧，记得说过官翻美版就是无锁的
