on how cottage Phone and Android "3" mobile phone is produced

To clarify the advantages of MTK in the business model, as well as Android for the future of the MTK mobile phone development will have any impact, first of all to understand the mobile phone from the design, development to production of the entire process. Let's take a look at the cell phone production process first. In the manufacturing process, the difference between cottage phone and genuine mobile phone is not very big.
1. Assembling the motherboard
Most of the electronic equipment manufacturing process, in fact, according to the design drawings to the parts of the combination of parts, mobile phone is no exception. The main components of the mobile phone are:1. Hardware motherboard, most of the current mobile phone is a single board structure, 2. Antenna, 3. Keyboard, 4. Display, 5. Housing . where the motherboard is a key component. Each handset manufacturer's technical ability is different, in the handset manufacture industry chain localization also is different. Have the strength of the manufacturers will start from the Gerber file, the production of their own PCB board. But do not have the PCB production capacity of the small factory, can be ordered to other manufacturers have produced a good PCB board. Figure 9 is a MTK produced by the PCB board.

Figure 9. A MTK produced PCB board [] courtesy Http://farm3.static.flickr.com/2638/4165315089_04cccc5383_o.jpg

With the PCB board, you can start printing and Smt. With the development of technology, the old-fashioned through-hole PCB board has been almost extinct, modern PCB board most of the use of surface mount technology. The mounting process is divided into three steps.
1. Put the PCB into the printing press, press the solder (Solder Paste) through the template printing in the area that needs to be welded, see Figure 10.
2. Put the printed PCB board into the SMT machine, SMT machine to mount the components on the PCB board, figure 11. Small components are mounted on the market, larger from the plastic pipe into the placement machine, Figure 12.
3. Put the board into the reflow soldering machine , after preheating, heating, components are welded on the PCB board. Figure 13 shows the welded motherboard.

Figure 10. Printing press the solder through the template printed on the PCB board need to weld the site [courtesy] Http://farm3.static.flickr.com/2642/4166073144_858c9b9df6_o.jpg

Figure 11. SMT machine to mount the components on the PCB board [courtesy] Http://farm3.static.flickr.com/2738/4166074266_048dae75b2_o.jpg

Figure 12. SMT machine Close-up, small components mounted on the market, larger from the plastic pipe into the placement machine [courtesy] Http://farm3.static.flickr.com/2661/4169062298_565433bd94_o.jpg

Figure 13. Welded mobile motherboard [courtesy] Http://farm3.static.flickr.com/2660/4166077558_91bc66bf8e_o.jpg

The manufacturing process emphasizes quality control, and quality control is embodied in many aspects.
1. The production line is equipped with a variety of automatic equipment to detect whether each process is working properly. Figure 14 shows a product quality display on a mobile phone line.
2. The welded mobile phone motherboard was fed into the test bench, and the test bench was given a power test for the phone board, figure 15.
3. If the indicators are qualified, you can enter the next process, install the system software. If it does not pass, it will require manual inspection and repair, figure 16. For example, some ICs are square and may be turned 90 degrees when pasted.

Figure 14. A product quality display on the mobile phone production line [courtesy] Http://farm3.static.flickr.com/2670/4165330751_b326843496_o.jpg

Figure 15. Test bench for mobile phone motherboard power Test [] courtesy Http://farm3.static.flickr.com/2562/4165321507_de2b35349f_o.jpg

Figure 16. Manual inspection and Repair [+]Courtesy Http://farm3.static.flickr.com/2572/4166083106_e63709dcb5_o.jpg

2. Burning System software
After the hardware manufacturing is finished and tested, the next step is to burn the phone system software. Mobile phone system software is in the form of Flash Image , stored in the workstation. Connect your phone's motherboard to your workstation via a serial port or USB port. Then start the installation program in the workstation and burn the system software to the flash memory on the phone's motherboard, figure 17. A workstation can simultaneously burn dozens of mobile phone bare boards.

Figure 17. Mobile phone system software Installation Workbench [courtesy] Http://farm3.static.flickr.com/2543/4168191161_f66d9740ce_o.jpg

3. Assembling Peripheral Equipment
There are parts that are not able to use automatic equipment such as reflow soldering machines and need to be handled manually. Figure 18 shows the manual soldering of the handset microphone on the motherboard. Some parts do not need welding, manual assembly, or screw. Figure 19, assemble the mobile phone parts without welding and screws. Figure 20, mounting the casing. Figure 21, hand-put mobile phone code serial number.

Figure 18. Hand-soldering mobile phone microphone [courtesy] Http://farm3.static.flickr.com/2640/4168962000_7b8b2cf9a0_o.jpg

Figure 19. Hand-assembled mobile phone parts without welding and screws [courtesy] Http://farm3.static.flickr.com/2544/4168985040_f7f4ddb504_o.jpg

Figure 20. Hand-assembled mobile phone shell [courtesy] Http://farm3.static.flickr.com/2517/4168217589_ac6c4594de_o.jpg

Figure 21. Hand-put mobile phone code serial number [courtesy] Http://farm3.static.flickr.com/2546/4168228041_ab02af61db_o.jpg

4. Calibration and inspection
After the mobile phone assembly, also need to detect radiation, transmitting power, standby time and so on, there are some parts calibration, such as antennas . Figure 22 is estimated to be in the calibration antenna. Figure 23 is testing the sound. Manufacturers will use more professional testing equipment, figure 24.

Figure 22. The antenna may be calibrated [courtesy] Http://farm3.static.flickr.com/2606/4168243487_9b4b9841db_o.jpg

Figure 23. Test sound [courtesy] Http://farm3.static.flickr.com/2785/4169007364_43fdd90aee_o.jpg

Figure 24 more professional testing instruments [+] courtesy http://farm3.static.flickr.com/2623/4170586975_4bbbe14b62_o.jpg,/HTTP// Farm3.static.flickr.com/2577/4171352084_c49427bdbb_o.jpg, http://farm3.static.flickr.com/2560/4171357448_ F740bf3a91_o.jpg


5. Packaging Factory
After the completion of the pre-classification process, you can pack and ship, Figure 25.

Figure 25. Packaging Preparation Factory cottage [courtesy] Http://farm3.static.flickr.com/2702/4168249409_348a63a654_o.jpg

As a result, we can see that the production process of mobile phones is almost identical to that of all other electronic devices. Can not produce mobile phones, on the one hand, without the necessary funds to purchase production equipment and training staff. On the other hand, the design of hardware and software needs to be. And the latter may be more important. The hardware and software design includes the following content.

1. Motherboard design, or Gerber file, or PCB board.

2. System software.

3. List of all components that need to be assembled (BOM list).

4. The supporting housing.

1.2. Belongs to design, 3. 4. Belonging to the procurement. Once the software and hardware design, as well as the BOM List, can be purchased from the market, preparation, and then you can start to manufacture. The question is, who provides the hardware and software design and BOM list?


Reference,

[13] Cottage phone made the big secret. (http://news.xinhuanet.com/it/2009-02/02/content_10749450.htm)
[14] Shanzhai News survey. (http://laiba.tianya.cn/laiba/commmsgs?cmm=34721& tid=2645440990215816570&ref=commmsgs-paging&na=3 &nst=501& amp;pno=11&cpno=9& nid=34721-2645440990215816570-2655961375168415098)
[15] Friends of the high-level mobile phone interview record. (http://www.unitone.com.cn/newsshow.asp?id=76)
[+] Metrico for mobile device performance assessment. (http://www.metricowireless.com/services/index.php)

on how cottage Phone and Android "3" mobile phone is produced