Question about Siemens SX66

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Sx66 to tmobile

I just bought the sx66 on ebay unlocked but all the settings are cingular i have tmobile as a carrier. i am having troubles setting uo email and mms is there any way i can convert my sx66 to tmobile settings

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Re: sx66 to tmobile

As I understand it, the SIM card is what tells your wireless unit which service provider to use. If you have an old phone, it should be an easy matter to take the t-mobile SIM card out of it and install it in the SX-66. One note on the SX-66: the SIM card on mine had a tendency to lose contact (and my contacts would disappear) from jarring until I put a piece of scotch tape across the bottom of it. No problems after that.

Posted on Jan 01, 2008

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Bought the phone off of ebay. Need to know how to clear the previous owners data, calandar, contacts, etc. Also the phone was previously used with cingular service, I have tmobile and when I install my...

Every phone ships with a factory reset option. Check out the settings for Factory Reset. This will remove all data on the mobile and will revert it back to the settings as when it was when bought.

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1 Answer


The only carriers that allow you to setup an "Unlocked" phone, I believe are Cingular and tMobile. So it isn't really worth the effort. Plus, if the phone is ever reported as lost or stolen, it's blocked and rendered useless. (Makes it nearly pointless to buy an ebay phone for example.)
As for the applications, Blackberry are hopelessly tied to the provider. However, I noticed after the last major update; most providers seem to allow a pretty unified distribution of typical applications. The worst, least open, being in my opinion Sprint.
The blackbery themselves are pretty accessible, if you add a microSD card you can pretty much copy to it like a thumb drive.

If your set on cracking your Blackberry, I'd try Howard Forums in the RIM section...

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Go to start-settings-connections-gprs: Delete the T-mobile settings. Create a new connection labeled MediaNet Connects to: The Internet Access Point: wap.cingular
Go to start-settings-connections-proxy: Delete the t-mobile settings. Create a new proxy called Cingular WAP Connects From: The Internet Connects To: WAP Network Proxy: Type: HTTP

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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)

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Sx66 won't read my sim card

Try and ebay for ROM upgrades. There are many people who unlock these kinds of devices. I don't believe you can upgrade it to WM 5.0 or beyond, but that may be possible. The best bet is a newer version of PPC 2003.

The process is relatively simple. Once you have your ROM on CD or via download, You run it with your device hooked up to your PC via cable/cradle and connected via ActiveSync (3.7 or later). The warning is an improper ROM load could make your device unusable. It is a risk you have to take if you want it to make calls. Toss up: no phone Pocket PC, pocket PC phone, or shiny brick. If the XDA site has recommendations on a ROM source, they are not likely to steer you wrong. They will state emphatically, that you do not want any interruptions in the ROM upgrade process. If you have a power outage or something shuts off for any reason, you will have the shiny brick and be looking for a new device.

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I don't think anyone here can give you a sim unlock code. Unless you want to pay for it you can buy from ebay.

Run this unlocker on your phone. Follow the instructions exactly. Don't unlock the CID unless you planning on installing another custom rom other than ATT on it.

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