Best way to unlock SMT5600

[ChemNerd]

I asked this in another post but no one has responded so I'll ask it dirrecltly in better hopes of getting an answer.

I ordered a SMT5600 online. It's locked for AT&T. I need to unlock it for use with T-Mobile.

What is the best way to do this? I have seen people discuss several ways and I'm not sure which is the best. If you have an unlocked one - how did you unlock it?

Thanks!

[Mike Temporale]

http://www.c500-unlock.com seems to be what people are using.

[Tickster]

I bought an SMT5600 for use on T-Mobile. I used the unlock site mentioned above and it worked like a charm. I put in my T-Mobile sim card and was able to make calls without trouble. You will need to change a few T-Mobile settings for GPRS and MMS. I had to add the T-Mobile t-zones feature for $4.99/mo. in order to get email/internet working.

Settings to change:

T-mobile
GPRS Connection
---------------
Title: T-Zones GPRS
Connects to: The Internet
Access Point: wap.voicestream.com
Username:
Password:
Primary DNS: 216.155.165.050
Secondary DNS:
IP Address:

MMS settings
------------
Title: T-Zones MMS
MMSC URL: http://216.155.174.84/servlets/mms
WAP Gateway: 216.155.165.50

[Spatulator]

Is it necessary to have the sim card installed before you unlock the phone? I just bought the SMT5600 on ebay and I plan to unlock it using this method but I dont have a sim card from T-Mobile yet.

[Vuvision]

Is it necessary to have the sim card installed before you unlock the phone? I just bought the SMT5600 on ebay and I plan to unlock it using this method but I dont have a sim card from T-Mobile yet.

I also purchased one via ebay last week, and had similar question as you did. You can unlock the phone without the sim card with no worries ... worked for me.

http://www.smartphonethoughts.com/forums/viewtopic.php?t=7580