Nokia 6230

There are some things in life that makes me feel like I’ve paid for only a portion of my money’s worth. Crippled phones is one of those things.

Carriers want you to user their services, carriers “lock” phones so you can’t use them on a competitor’s network. Sometimes carriers disable other features as well. But then you might be able to unlock your phone regardless of whether your carrier cooperates. Be aware, though, that doing so might invalidate your phone’s warranty; read the fine print.

Service providers generally subsidse a portion of the phones you buy with a time locked contract, and they need to recoup that money. So, for example, some carriers make it difficult for you to employ Bluetooth to let your phone act as a dial-up modem for a notebook or handheld (presumably to push you toward expensive over-the-air data services). Locked GSM phones also cost you money when traveling, as you can’t swap out your SIM (Subscriber Identity Module, the tiny card that holds the phone number and other information specific to your handset) for one from a local carrier, which generally will charge less than most U.S. carriers do for overseas roaming.

The easiest and most common unlocking technique is to enter special numbers on the dial pad–typically an unlock code plus your handset’s International Mobile Equipment Identifier (IMEI), Electronic Serial Number (ESN), or Master Subsidy Lock code (MSL). Some phones, including Samsung and Sony Ericsson models, you can unlock only by connecting them to a PC using special cables and software.

The safest way to get your unlock code is from your carrier. T-Mobile, for example, will provide codes 90 days after you subscribe. Cingular generally doesn’t help customers unlock phones, but makes exceptions on a case-by-case basis, says spokesperson Ritch Blasi. Sprint won’t unlock phones–period. (Verizon Wireless says its CDMA handsets are unlocked.)

If your carrier refuses to help, third parties will sell you unlock codes for $$ and then there are fellow cell phone users who share unlocking secrets–for example, Howard Forums (registration required) and Treonauts, which provides unlocking tricks for Cingular’s Palm Treo 650.

Some blog sites also help you on finding hacks on Bluetooth file transfers. For example, Our very own Verizon Treo 650 Picture Tranfer Hack ( I love it ) also IrishEyes and RussellBeattie.com publish instructions on how to unleash some of the Bluetooth powers of Verizon’s Motorola V710 handset.