Hello,
I have carefully replacing the M7 screen
The sim card is recognized but the connection to the provider became impossible.
Do you think that the GSM module is dead ?
Best regards
Make you didn't screw up the antenna
Sent from my GT-I9505 using XDA Free mobile app
TF85 said:
Hello,
I have carefully replacing the M7 screen
The sim card is recognized but the connection to the provider became impossible.
Do you think that the GSM module is dead ?
Best regards
Click to expand...
Click to collapse
You might have damaged a cable or a connector. You should disassemble and reassemble to double check everything is correctly connected and no damage to wires/connectors.
Did you operated the phone with the antennas disconnected (the back cover removed)? If yes your radio chip could have been damaged by reflected power. Antennas are critical, their impedance are calculated so they are balanced with the transmitter (SWR = 1). Remove your antenna and the transmitted power will be reflected back to the chip possibly causing irreversible damages. Thats why you never operate a radio transmitter (wifi router, CB radio, phone etc) without its antenna connected or a random antenna.
Related
Hi All,
A couple of weeks ago while repairing the cracked screen of my HTC One I broke the Wi-Fi/Bluetooth cable running across the phone. I ordered a new one and used the phone without it (With very poor Wi-Fi range) until the new one arrived. The antenna arrived yesterday and I installed it in the phone, however, upon booting the phone I have found that the range is still very poor.
Someone please help!!!
Thanks,
NoBones
NoBones said:
Hi All,
A couple of weeks ago while repairing the cracked screen of my HTC One I broke the Wi-Fi/Bluetooth cable running across the phone. I ordered a new one and used the phone without it (With very poor Wi-Fi range) until the new one arrived. The antenna arrived yesterday and I installed it in the phone, however, upon booting the phone I have found that the range is still very poor.
Someone please help!!!
Thanks,
NoBones
Click to expand...
Click to collapse
You might have damaged your wifi/bluetooth transmitter/receiver by using it without the antenna connected. Transmitters are designed to work with antennas that have calculated length and impedance based on the wavelength (frequency) used. If not using the right antenna or no antenna, most of the power is reflected back to the Tx/Rx circuitry and can cause irreversible damage.
Never use a device without its antenna or with the wrong antenna, this apply for all devices that have transmitter circuits. (WiFi routers, phones, CB radios, etc etc).
I will not explain in details how it works, if you want to read more about this, search VSWR in google.
Wi-Fi Problem
alray said:
You might have damaged your wifi/bluetooth transmitter/receiver by using it without the antenna connected. Transmitters are designed to work with antennas that have calculated length and impedance based on the wavelength (frequency) used. If not using the right antenna or no antenna, most of the power is reflected back to the Tx/Rx circuitry and can cause irreversible damage.
Never use a device without its antenna or with the wrong antenna, this apply for all devices that have transmitter circuits. (WiFi routers, phones, CB radios, etc etc).
I will not explain in details how it works, if you want to read more about this, search VSWR in google.
Click to expand...
Click to collapse
So how can I get my phone operational again???
I love my HTC :'-(
Probably need a mother board replacement if your issue is caused by what I said
1 - Unmount Nexus 4
2 - Unmount router
3 - Disconnect internal antenna
4 - Connect antenna router.
RESULTS:
Internal Antenna: -51dBm 31asu
External Antenna: -69dBm 22asu
imageshack.com/a/img537/5858/AvqyxX.jpg
HSPA connects but the WiFi is not working, why?
If I unlock the network lte I can improve connection lte?
Thanks for your answers.
That connector is for one of the cell radio antenna, not the WiFi radio.You're also getting worse cellular "reception" as the WiFi antenna is not designed for cellular frequencies nor balanced or impedance matched.
The WiFi radio doesn't have an external connector, just the two pressure-pins on the left side that connect to the microstrip antenna adhered to the backside of the rear case. No antenna means you'll get nearly zero or poor WiFi reception.
Indeed. Notice the minus sign on those dBmW values. The higher the number part (when the sign is negative), the less the signal.
I have five Optimus L90 D415 phones for my family. My phone quit working on the T-Mobile network, although the wi-fi connection still worked for Internet usage only. No calls or texts could be sent or received, even with wi-fi calling enabled. The signal strength indicator was missing from the display. In Settings>About Phone>Network, Network was unknown, signal strength was zero, Service state was "out of service", and Mobile Network state was "Disconnected". In Settings>About Phone>Status, my phone number was unknown, IMEI was unknown, and IMEI software version was unknown.
T-Mobile said I needed a new SIM card. Got one, no help. That was the best they could do. After that, they said I needed a new phone, despite this one being only a few months old with no damage.
I took one of the other phones that was no longer in use, but still worked. The only fault was a cracked screen. First thing I did was to swap out the motherboard. This did not help, the fault stayed with the phone. Next, I swapped out the antenna cable that delivered cellular signal to the motherboard. No help. Finally, I swapped out the charger dock flex board. This board is on the other end of the antenna cable. This fixed the problem. This board does nothing more for the signal than provide a connection for the cellular antenna built into the rear frame, but there are also some very small components on the board (probably 3 caps and an inductor) mounted in the antenna circuit. My guess is that one or more of the caps went defective.
The charger dock board for the D410 and D415 is available on eBay for about $6. It is easy to replace. Find a disassembly video on YouTube, and remove only the silver rear frame, which exposes the motherboard and the charger dock board. Disconnect three connectors used by the charger dock board (two on the right, one of which is the antenna cable, and one in the center), then use a flat pry tool to remove it. Slide the pry tool underneath the antenna connector, and wiggle it back and forth to loosen the adhesive that holds the board in place. Once that side of the board is loose, slide the pry tool underneath the dock connector, and work the center of the board loose. Next, work the pry tool toward the opposite edge. Remove the defective board, and replace with a new part.
Did anybody notice the two antenna connection points near the SD card? Does anybody know what connector this is? I'd like to buy an adapter to test with an external antenna.
It's called U.FL I assume that one is for the cell radio and the other is for wifi/bluetooth. Does anybody know for sure which is which?
Re: Blu R1 HD Antennas
The coax going from the u.fl near the sim/SD going to the bottom of the phone is the cell antenna. I had to replace my speaker and also upgraded it, requiring me to remove parts of the plastic backing. I didn't see the adhesive antenna and cut through it. My WiFi works great, but almost no cell signal.
Just an fyi here You can get a FM radio to work on blu r1 hd with the unlock tool which can be found here
https://forum.xda-developers.com/r1-hd/how-to/unlock-tool-t3561333
You have to go to the second menu by pressing 5
Hi guys, i bought this phone (used) and there was no issues, but in one day it stops searching wifi. It sometimes may do it, but most time it shows that there is no networks nearby.
I think i should replace wifi module, but found no information where is it on this phone. May somebody told me that?
Hello, I don't think you can change the wifi module : it most likely is a chip soldered on the mainboard, you might want to check the connection between the mainboard and the antenna ?
matmutant said:
Hello, I don't think you can change the wifi module : it most likely is a chip soldered on the mainboard, you might want to check the connection between the mainboard and the antenna ?
Click to expand...
Click to collapse
this might make sense, which antenna should I check?
I don't own the Xperia 10 but it can be either embedded on the chassis with little nipples pressed on contacts on the mainboard (or the over way around) or it could be "standard" U.FL connector. If your device has fallen many times they could be a little loose as these are quite flimsy