About bringing a mobile phone back to China from Japan. Sharp 03A

Chinese input method: Authentic Chinese input methods are all made by netizens except nec's n-02a. Using the custom dictionary function, the square characters in Japanese are rearranged according to the pinyin habit of Chinese, which is convenient for input. The input square characters are neither traditional Chinese characters nor simplified Chinese characters, but Japanese square characters, which originated from the square characters of Tang Dynasty in China.

Card sticker: There are roughly two kinds of Japanese machines, one is the 3g network signal of wcdma used by DoCoMo/ Softbank (equivalent to China Mobile Unicom), and the other is the 3g network signal of cdma2000 used by kddi. These two signals are different from gsm signals commonly used in China, so they cannot be used directly. However, because some mobile phones support gsm signal roaming, some people with strong cracking ability made a card sticker. By combining the card sticker with the sim card, the mobile phone can use the roaming function of gsm to successfully realize the basic functions of the mobile phone in the area covered by gsm signals.

Gprs and Internet access: Because the card only cracked the gsm signal, and it is not perfect, even the gsm signal is unstable, let alone the network value-added service gprs under the gsm signal. The computer's built-in mobile phone Internet access system is set to Japan-specific i-mode Internet access mode, and docomo mobile phone Internet access cannot be realized except in Japan and Taiwan Province Province of China.

Unicom's wcdma: Because the 3g signal card hasn't come out yet, the usim card of wcdma can't be directly plugged into the mobile phone, and it will take time to test whether Unicom's 3g network can be directly used.

Ringtones: Because Japanese ringtones and live songs are downloaded from the Japanese mobile phone network, other areas can't access the Internet, and songs can't be imported as ringtones through tf memory cards, so docomo Japanese mobile phones can only be midi ringtones in China.

Midi ringtone: midi is a music format, and several file suffixes belong to midi format. SFI, MID and MLD suffixes all belong to midi format files. As long as the midi files with these suffixes are renamed, put into the folder corresponding to the tf card, and then transferred to the mobile phone, they can be used as new ringtones.

Bluetooth: In ordinary mobile phones, Bluetooth can transmit and do many things, but in docomo machines, it can only be used to receive several Bluetooth headsets, and other functions are not good.

Infrared ray (IR mode): the only solution in docomo mobile phone that can be used to transmit files wirelessly.

Anti-sneak shot setting: All Japanese mobile phones will have a white light flashing when the photo function is turned on, and the shutter tone cannot be cancelled when taking photos. This is a hidden rule in the industry to prevent candid shots.

I-mode mail: It is called mms in Softbank and e-mail in AU, which is what we often call mms. Most Japanese people like to send pictures or messages with this. It is different from ordinary e-mail. The so-called ordinary short message in China is called SMS in Japan and C-MAIL in Australia.

Outside the circle: SoftBank mobile phone (such as 904) is turned on, and the machine detects the Imsi of the card twice. If it is correct, it will issue the IMSI for the third time. SoftBank's network locking principle is to output SoftBank's IMSI twice and give the real IMSI the third time.

DOCOMO mobile phone is stored once when it is turned on. If it is the IMSI of DOCOMO, it will immediately send the stored IMSI to the base station, but now the card can't be bypassed and it is easy to get out of the circle.

On the soft solution: recently, n-02a of nec from Taiwan Province Province can be soft-solved. The following is an explanation of what a soft solution is. According to the explanation outside the circle above, when the docomo mobile phone is turned on to detect the imsi, even if the detected imsi is wrong (because it is not docomo's usim card, it must be a detection error), it will be sent to the base station. If this goal can be achieved, it is called soft solution.

Soft solutions do not depend on whether the card is inserted directly or not. Specifically, what can't be inserted directly must not be a soft solution, and what can't be inserted must be a soft solution.