Taobao's magic tool turns iPhone into dual SIM dual standby, and the actual test is shocking

Everyone knows that the iPhone has no dual SIM card dual standby function. Recently, a small device has been hotly discussed on the Internet, claiming that it can also enable the iPhone 6 to have dual SIM card dual standby function. Yesterday, the reporter bought a device called Shuangxianghao to see if the iPhone dual SIM card dual standby function is reliable.

Innovative: Connect to Bluetooth to make and receive calls, iPad can also be used

If you type "iPhone dual SIM dual standby" on Taobao, you will instantly find a number of devices with similar functions. The reporter bought a popular device called Shuangxianghao.

After receiving the product, the reporter saw that the manual said that the device was produced by a Beijing digital company. After removing the back cover, you can see the SIM card slot, which supports mini SIM cards (most Samsung phones use SIM cards of this size), and can also use Nano SIM cards (iPhone 5s and above use Nano cards) through the card holder.

After inserting the SIM card, press the Bluetooth button on the box to pair. However, the pairing cannot be successful in the Bluetooth interface of the iOS system. You need to download an APP called Shuangxianghao in the Appstore and enter the SIM card number in the box to register for pairing.

After pairing, the reporter put the SIM cards of China Mobile and China Unicom into the dual-number box, and both were able to connect to the mobile phone APP to make calls and send text messages, realizing dual-SIM dual standby. However, the SIM card installed in China Telecom could not be used normally. Later, I tried it with an iPad, and it could also make calls normally.

Flaws: Long delays in making calls and text messages

So, is it powerful in use? First of all, because the secondary card is connected to the mobile phone via Bluetooth, the reporter cannot use the secondary card to dial in the dialing interface of the iPhone. You must open the Shuangxianghao APP to use the secondary card. The APP sets dialing, text messaging and other functions. When making a call, you can also call the numeric keypad, turn on hands-free calling, and achieve mute functions, which is not much different from the dialing interface of the iPhone. In use, after the APP dials, the connection time is slightly longer than normal mobile phone dialing.

The biggest difference is answering calls and receiving text messages. When answering a call, the phone does not pop up the answering interface, it only makes a sound and pops up a notification page. You must unlock the phone and enter the APP page to answer and hang up the call.

The APP provides vibration settings, but after multiple attempts, the reporter was unable to turn on the vibration function for incoming calls, nor was he able to change the ringtone for incoming calls from the secondary card.

When receiving text messages, a preview of the text message content will pop up on the lock screen. To read the content, you also need to enter the text message option in the APP to browse. The APP's text message function can only send text messages, and does not provide an option to send multimedia messages. The reporter used another mobile phone to send a multimedia message to it, but it was displayed as garbled characters and could not be recognized.

The worst part: calls and incoming calls are charged according to domestic roaming charges

During use, China Mobile customer service actually sent a text message reminding me of roaming charges.

The reporter called the 400 service hotline provided by the APP. The hotline staff confirmed that the charges were based on the domestic long-distance roaming charges. The box was small and did not have a positioning component installed. Even if the call was made locally, the operator could not confirm the user's location, so the charges would be based on the roaming standards.

The staff member said that currently China Mobile and China Unicom have launched a number of free packages for nationwide roaming-free incoming calls, and users only need to change the package. In addition, he also claimed that as long as the box is connected to Wifi abroad, it can also make calls through their servers, and the charges are also based on domestic roaming.

The reporter consulted Taobao about other similar products, and the stores of many products said that they would indeed be charged according to domestic roaming charges, and only one product clearly stated that it would be charged according to local calls.

A person related to China Mobile said that they had never heard of such equipment. At present, China Mobile has indeed launched a package with a minimum price of 38 yuan, which includes nationwide roaming call time and free incoming calls. Even if the amount exceeds the limit, the charge is only about 0.2 yuan per minute.

Expert analysis: Rely on the network to connect to the merchant server

Ma Yuxi, editor-in-chief of the hardware division of Computer News, said that as early as two or three years ago, there had been a plug-in that enabled iPad, iTunch and other devices to make calls through a wired data interface. The principle was similar to that of the dual-share number, the difference being that it now uses Bluetooth connection.

Ma Yuxi analyzed that the reason why local calls become domestic roaming may be that the principle of the device to make calls is to verify the SIM card information and connect to the merchant server, and then connect to the network of China Mobile or China Unicom. Calls from the location of the linked server to Chongqing are naturally charged according to domestic roaming fees. Even if you are abroad, it is equivalent to making a call in China.

However, this principle must rely on the network connection to the merchant's server, and calls cannot be made after the network is disconnected. Since the SIM card information is uploaded, there are certain security risks, which may cause the SIM card to be copied or stolen.

The reporter then disconnected the mobile phone Wi-Fi and cellular network, and the Shuangxianghao APP could no longer be used for dialing. The reporter printed out the details of the current call through China Mobile's online business hall and found that the caller's location was in Jiangsu, and even if the call was made to the 10086 customer service number, roaming charges were still charged.

As a winner of Toutiao's Qingyun Plan and Baijiahao's Bai+ Plan, the 2019 Baidu Digital Author of the Year, the Baijiahao's Most Popular Author in the Technology Field, the 2019 Sogou Technology and Culture Author, and the 2021 Baijiahao Quarterly Influential Creator, he has won many awards, including the 2013 Sohu Best Industry Media Person, the 2015 China New Media Entrepreneurship Competition Beijing Third Place, the 2015 Guangmang Experience Award, the 2015 China New Media Entrepreneurship Competition Finals Third Place, and the 2018 Baidu Dynamic Annual Powerful Celebrity.