解鎖／JB機的push notifications一般都會有問題

在網路上看到以下這個解決方法：

For People with Unlocked iPhones:
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1. SSH onto your iPhone (for those not that don't know how, download a cydia app such as "iFile" that lets you browse files on your iPhone)

2. Go to: /var/root/Library/Lockdown

/activation_records

3. Delete the file called "wildcard_record.plist"

4. Insert an official carrier sim (UK = o2, USA = AT&T ect)

5. On returning to the springboard your iPhone should now ask for activation, plug it into itunes and let it be activated legitimately
(5.5. If not then re-boot your iPhone and it will ask for activation, plug it into iTunes and Voila!)

6. This isn't essential, but before you put your 3rd party sim back into the iPhone you should try opening an app that uses push notifications (such as ping!) and testing it out with the official carrier sim first

**REMEMBER: Unless your phone is connected to your wifi network, you will have to manually input the network settings for each sim before push notifications will work

（來源：http://www.facebook.com/topic.php?ui...64&topic=10881）
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簡單地講，就是把wildcard_record.plist這個檔刪掉以後，插入一個官方電信公司的sim卡
（台灣應該就是中華吧），進iTunes正常activate，然後把解鎖sim卡插回來，push
notifications就能正常運作了

以上方法不知道有沒人試過？真的可以成功嗎？會不會引起什麼副作用阿？很想試試看，但又有點害怕...