Mobile Cell Phone Network Not Working Problem and Solution – How to Solve No Network Problem in any Mobile Cell Phone

This chapter explains Mobile Phone Network Problem and Solution –How to Solve No Network Problem in any Mobile Cell Phone. These problem and solution apply to all brands and make of mobile phones including Nokia, Samsung, iPhone, China Mobile Phones, Motorola, HTC, Sony, Blackberry, Alcatel, Apple, AudioVox, Benefone, Danger, FIC, Hagenuk, Palm, Kyocera, LG, Panasonic, Huawei, ZTE, Spice, Lava, Sony Ericsson, Micromax etc.

What is Network Section in a Mobile Cell Phone?

Network Section in a mobile phone is the section that controls the incoming and outgoing phone calls. In a mobile cell phone the Network Section is controlled by the Network IC, PFO and the Antenna. The network section is divided into following 2 parts:

1. RX – Receiving Section
2. TX – Transmitting Section.

Types of Faults or Problems with Network in any Mobile Cell Phone

• There is no network in the mobile phone.
• There is less or weak network signal.
• Sometimes there is signal and sometimes there is no network signal.
• There is network signal for some time and then there is no signal at all.

Mobile Cell Phone Network Not Working Problem and Solution – How to Solve No Network Problem in any Mobile Cell Phone

1. Manually search for network. If there is NO Network then there is problem in the Antenna Switch. Repair or Replace the Antenna Switch to solve the problem.
2. If there is Network after Manual Search but the Home Network could not be selected then there is problem in the PFO. Repair or change the PFO.
3. If the Network gets disconnected during phone call there repair or change the Network IC.
4. Clean the Antenna Tips and Antenna Point.
5. If there is still Network Problem then Heat or Change the 26 MHz Crystal Oscillator.
6. If the problem is not solved then Heat or Change the Antenna Switch. You can also jumper if Antenna Switch is not available.
7. Heat, Change or Jumper the PFO if the problem still persists.
8. Heat, Reball or Change the Network IC.
9. Heat, Reball or Change the Power IC.
10. Heat, Reball or Change the CPU.

Note:

• If there is Low Network then Jumper the Antenna Socket. Refer to correct diagram to jumper.
  

  Mobile Phone Network IC
• Check BSI of the Battery.
• If the problem is not solved by Hardware then Reload PM File in the Mobile Phone using the Software Box.
• In China Mobile Phones, if there is SOS Call, then copy SOS File from another similar mobile phone and reload it in the mobile phone with Network Problem.