Statement of needs
Last week, it took 8 days to drive from Dunhuang to Chongqing (most of them were other friends driving). It was tiring and lost his mobile phone. Previously there was a blueprint for the next purchase of mobile phones and what functions they needed. Therefore, the demand for mobile phone purchases was relatively clear: 1) Within 2000 yuan 2) With VOLTE+NFC+4G+ (some are also called For carrier aggregation, CA) 3) I am not face value, appearance is not a cold 4) I am not a game player, video player, etc., performance is not a cold 5) Because you also need to use RFID-SIM brush access control, brush cafeteria, need to support Micro SIM card (cut into Nano card afraid of damage to the chip).
Screening process
Looks like the demand is simple, but it is difficult to buy. Jingdong can filter by price, network standard, hotspot, etc. However, when “NFC support†is checked in the “hot spot†(as shown below), more mobile phones that do not support NFC are coming out. Then go to Taobao to compare the screening, found that there is no way to screen VOLTE, NFC and so on. This proves that although Jingdong is not perfect, at least it still has this function.
The initial screening result is that few mobile phones have the above requirements (VOLTE+NFC+MICRO SIM+4G+), and the rest seems to be Samsung. Not willing to give up the domestic mobile phone ah (thousands machine I personally feel that the domestic machine can be worthy of a big job), had to go to Tmall national flagship store to ask customer service, demand on VOLTE + NFC + MICRO SIM + 4G +, asked over the following The domestic customer service is basically a Nano SIM card!
No way, only choose J7108.
About J7108 out of the box and baby blueprints, you can refer to this site man5's "actually also very good Samsung low-end mobile phone: Samsung Samsung Galaxy J7108 Yue Ying Bai Mobile Unicom 4G mobile phone", in view of the time, I do not want to repeat the sun It wastes everyone’s valuable time.
I bought it from JD. I usually buy digital products. I chose JD.
Asked before the Tmall flagship store, customer service directly reply I can not use 4G + (proved after the customer service is wrong), and the price is expensive!
An estimated friend asked why I value these functions? I would like to say whether the J7108's capabilities are available or not because of the functional requirements.
VOLTE
I don't usually have a video call. Wechat is so convenient! The reason why I need this function is as follows: 1) The connection is fast. When the number is dialed, the ring tone is immediately heard. It is much faster than the VOLTE connection. 2) During the call, the Internet access is not interrupted. Timely receipt of WeChat messages or incoming calls to harass the phone (open yellow pages number library function) - these 2 points are tested and supported by the mobile phone. The following picture shows Samsung's official mobile phone promotion pictures:
The actual mobile phone display is as follows, and everyone pays attention to indicators 1 and 2:
1 is the default cell phone opened, mobile phones can use VOLTE? No way. Also need to call 10086 (China Mobile) customer service opened on the network side, otherwise the phone will not appear 2 logo, and in the process of actually making a call, the network will be converted from 4G immediately to G or E, then WeChat and other messages Will always be blocked in line to the end. After playing 10086 to open VOLTE, the 2's logo (HD) appeared, the 4G icon did not change during the call, and the connection was indeed much faster.
2.4G+
What are the benefits of this feature? Samsung's official introduction is as follows:
Simply speaking, it is faster than 4G Internet access. The specific point is that from the ordinary 150Mbps can be increased to 300Mbps or 600/900 (usually operators should limit the speed, right?) The specific display on the phone is as follows:
Everyone needs to look at the logo 3, where there is a 4G+ symbol (compared with other mobile phones, other mobile phones are estimated to have a switch that turns on Cat 6 in the picture), whether it really supports the download speed of 300Mbps, and I did not test. I will temporarily assume that Samsung has turned on the CA function by default. By the way, it should be added that the current operators (such as China Mobile) do not fully cover the carrier aggregation function. Therefore, the logo of Figure 3 will change as the network environment changes.
This function needs to test the download rate to verify when the icon shows 4G+, welcome interested friends and supplement the test data.
3.NFC
How do you say NFC? The previously used siblings (MX4 PRO) verified that they can recharge the bus card (very convenient, especially if the balance on the train is insufficient and do not borrow money from the surrounding passengers); it also verifies that China Merchants Bank, China Construction Bank, etc. Open cloud flash payment (but the Bank of Communications can not!), although there are few places to support brush cloud flash payment (there is a dairy in front of the community, QUIKPASS logo break the POS, the owner does not know how to brush, I go to use the phone brush , there are 81 error codes, do not understand). Although there is a certain problem with the quick payment of cloud flash payment, it is convenient for the bus card to be recharged, so this time I still require the NFC function to be available.
But this Samsung cell phone has caused me trouble. I used my RFID-SIM card and NFC automatically recognized my SIM card, which made it impossible to identify the bus card. Compared with the original four Po, it is because of different locations: Si Po's SIM card in the top of the fuselage, NFC antenna film in the middle of the fuselage, a very reasonable layout (picture borrowed "demolition demolition! - Meizu MX4 Pro disassemble replacement volume cable process, thank the author piecesouliu):
But J7108 is the following layout (I borrowed the picture of man5's “Samsung low-end mobile phone: Samsung Samsung Galaxy J7108 Moonlight Mobile Unicom 4G mobile phoneâ€). I was lazy on the one hand, and recommended on the other hand. You can first go to this side to introduce an understanding of the phone):
This layout will inevitably lead to the close of the back cover, RFID-SIM will closely fit with the NFC antenna! In addition to the inability to recharge the bus card, the mobile phone did not come to the cloud to pay for the POS terminal test.
Third, fly in the ointment hope designers can improve The article hopes that the Samsung engineers can see that the NFC antenna film of the Note2 mobile phone, which is in arrears, also covers the SIM card slot. Take J7108, why can't you design a film like this?
Is it impossible to leave the NFC antenna film away from the SIM card slot? ? ?
Fourth, leave a question, look forward to the help of friends In general, RFID-SIIM is used more often, so it is not significant if NFC is not used to recharge bus cards. However, I would like to recharge my bus card and I don't have a ready-made ordinary SIM card to borrow. How can I solve it?
Is there a shielding material and a relatively small one? Usually do not cover the SIM card slot, when you need to use NFC to cover the SIM card;
Or is there an NFC antenna overlay, similar to the one shown in the last picture, let me tear it off and re-paste it with a new one? NFC antenna coil, need to adapt to NFC chip?
Or does any heroes directly recommend a mobile phone with VOLTE+NFC+Micro SIM+4G+?