Question about Cingular Wireless 8125 Smartphone

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Will not power up on AC or usb adapter

Cingular 8125 will not run on AC or usb adapter. Works ok with charged battery. Have taken the phone apart and get power at the charging port.
What else can I check?

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  • josh_wingler Jan 14, 2009

    i have the same problem. but mine will not power on with a battery either.

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I had the same problem with my 8125, until I saw the posting by: randaleb2002 , I didn't want to cut my power cord but I did have an extra USB cable, I cut the cable in half and striped the red and the black wires, the red is the positive and the black is the ground (negative). I held these to the red and black terminals on the battery for aprox. 3 min. and sure enough when I put the voltage tester on the terminals it read aprox. 3.1Volts and the device powered on I now have the phone charging, and it seems to work great, I also had a battery for the 8125 that I thought was fried I did the process on it however and it to works great,

so thanks to who ever
randaleb2002 is.


Posted on Jan 27, 2009

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If you have an extra charger for the phone remove the end take the exposed copper wires hold them to the positive and negative post's on the battery for about 3 minutes and then plug into the normal charger.
I know this works I did it to my phone last night.

Posted on Jan 21, 2009

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Jun 12, 2009 | Cingular Wireless 8125 Smartphone

1 Answer

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Jun 01, 2009 | Cingular Wireless 8125 Smartphone

1 Answer

Need to replace small battery on main board for cingular 8125


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HTC 8125


you have to contact T-mobile technical support and have them guide you through programming their internet settings on the phone. although the phone is unlocked the internet settings currently on the phone is for cingular. have them program the same settings as the t-mobile MDA phone (same phone as 8125, shipped for t-mobile)

Aug 20, 2008 | Cingular Wireless 8125 Smartphone

2 Answers

No power


Make sure you have an original OEM charger for the MDA. Many of the knock off chargers don't provide the right amperage for the device. What happens is that since the phone is completely dead, it can't regulate how many amps the battery should get during the charge and an incorrect charge current won't charge the battery. I'm guessing that someone sold you a Motorola RAZR charger or another knockoff made for the RAZR. This might charge your phone when the battery is working, but not when it's DEAD. Also you won't have luck plugging it into a computer USB cable because, again, the phone can't tell the computer what charge to send and most computers only produce <0.5 amps in the USB port.

Get a charger that states it is an OEM (original eqipment manufacturer) device or one that is specifically designed for the MDA (or Cingular 8125). eBay is full of them.

Bad charger (probably won't work for a dead battery)

Good Charger (correct amperage and designated for the MDA)

Jul 08, 2008 | T-Mobile MDA

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You need to jump start the battery.. The phone's charging capability is controlled by software (pretty dumb) so without enough juice from the battery it won't charge.

Grab an old USB cable (or other 5 volt source) and cut off one end.. take the red wire and put it on the battery contact on the end with the red plus sign. Put the black wire on the other end. Hold the wires there for about 3 minutes. Be careful not to switch the positive and negative.

Now reinsert the battery into the device, and without turning it on, plug in your charger. the charging light should come on shortly, and just leave it off charging for about an hour before turning it on..

Thats all Folks

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