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| IPhone 11 Always Searching for Network IMEI Present | |
|---|---|
| Device | iPhone 11 |
| Affects part(s) | Motherboard |
| Needs equipment | |
| Difficulty | ◉◉◉◌ Hard |
| Type | Soldering |
Problem description
The iPhone is unable to get network service but IMEI is present when dialing *#06#.
Symptoms
- The iPhone is unable to get network service but IMEI is present when dialing *#06#.
- The Phone is always searching for network.
Diagnostic Steps
Start by opening the Phone app and dialing *#06#, and you see a window pop up with the IMEI.
Go to the Settings app, General > About, scroll down, and check if Modem Firmware is present.
When this information is present, it already tells us that the Baseband CPU and Power Management Unit (PMU) are working.
The next step is to split the motherboard.
The first thing to check after splitting the boards is for any ripped pads, which is really common in phones that have suffered hard drops.
Having ripped pads doesn't mean the problem is caused by them. If you find a ripped pad, you must check on a BoardView diagram what that trace or line does and if there are any other alternate points. For example, there are a lot of ground points, if you are missing a few, it’s unlikely that it will cause an issue.
The next thing to check is to compare the diode readings of specific pads with a known good board, or if you have a program like ZXW, you can check the values there, but generally, you want to check the lines or pads close to the network-related chips.
The Network circuit is devided into both motherboards the top board and bottom board.