I have some troubles with my Cingular 3125

[mikolopatamys]

1- it's reboot many times without any reason(I read one thread about it but i dont understand what to do!!)
2-sometimes 2gb microSd card loosing?(i cant open it from phone...only rebooting helps!!)On other devices card works good!

[Tiger Shark]

The usual reason for a 3125 rebooting is that the battery cover has gotten worn down to the point that the micro-switch under it is not fully depressed. There are multiple potential wear-down points. The hooks on either side and the tabs at the bottom can get worn or even broken. There is also a raised pad at the lower left (looking at the cover from the inside) than can get worn, as can the contact point on the switch.

Typical solution, providing the hooks and/or tabs are not totally broken off, is to put a thin piece of plastic or cardstock between the microswitch (lower right of the batter compartment) and the cover. It's a temporary solution (it tends to get continually worse), so if this fixes it, you should check eBay for a replacement cover.

That said, I had a phone that reset for another reason, which I never found. So it could be something else. I ended up buying a phone with a bad keyboard and doing a keyboard transplant from my old one.

[dexx40steve]

I had the same problem and I'll tell you what I did. Open the back cover and you will see a little black switch next to the sim card/below the battery. I took a pair of needle-nose pliers and just twisted that sucker right out like a bad tooth (carefully though, you don’t want to tear up the foil on the board). Then I put a small spot of solder on the two contacts that the switch used to connect to. Never had a random reboot ever again. From then on, just make sure you take the battery out first before ever messing with the sim/sd card.

[okoto]

That worked for me.
Thanks

[m0000]

I had the same problem and I'll tell you what I did. Open the back cover and you will see a little black switch next to the sim card/below the battery. I took a pair of needle-nose pliers and just twisted that sucker right out like a bad tooth (carefully though, you don’t want to tear up the foil on the board). Then I put a small spot of solder on the two contacts that the switch used to connect to. Never had a random reboot ever again. From then on, just make sure you take the battery out first before ever messing with the sim/sd card.

i have the very same problem and this sounds like a perfect long term solution.. any chance of getting picture of ur mod for morons like me who need visual stimulation?

regards,