一指點中 iPhone4 死穴

wow! thank you for this information!
又學到新野啦！！

甘jei係話文章裡面果個人令到VSWR大幅偏離1，所以大幅偏離GSM的頻段，造成沒有收訊
而我果段片裡面個人令VSWR偏離很少， 所以無偏離GSM的頻段，收訊無影響

而手機當發現嚴重偏離GSM頻段時， 他會自動切換到另外一個頻段
但根據這篇報導： http://www.appleinsider.com/articles/10/06/25/death_grip_hysteria_may_end_monday_with_ios_4_01.html

軟件未能正確調教，導致出現“無訊號”
“The fix is expected to address a issue in iOS 4 related to radio frequency calibration of the baseband. Readers who saw the original forum discussions say that the issue is believed to occur when switching frequencies; because the lag is allegedly not calibrated correctly, it results in the device reporting “no service” rather than switching to the frequency with the best signal to noise ratio.”

亦即係話，當iOS 4.0.1解決調教問題後，甘就ok啦^^