There are two types of locks.
(1)  SIM Lock

This is the lock that allows your phone to only use a SIM card from a specific company.  In our case, AT&T or Cingular, but not both.  It is the result of anti-competitive pratices and is hard-coded into the core software that comes with your phone.

Fortunately, SPV-Developers figured out how to get rid of it so you can change carries and still have your phone work!
(2)  Application Lock

This is a lock that prohibits you from installing certain types of applications.  An early Typhoon model, the UK's 'c500' from Orange refuses to install any applications that do not have proper certification.  You'll hear the Brits complain every now and then about this problem, but the truth is they got the Typhoon significantly earlier than those of us in the states.  Also, their providor, 'Orange' released a tool to application unlock all their phones.

Because the US gets screwed by the stupidity of our oligopoly providors, the "Audiovox SMT5600" - a version of the HTC 'Typhoon' - had slightly newer software.  One of the modifications is that most applications *can* be installed with uncertified (ie, free) ones giving you a warning prompt.

For one reason or another, this isn't the same as having a truly application unlocked phone.  Some residual lock remains, which prevents the SPV SIM unlocking tool from working.  So, to do that, you must first application unlock your phone.  Quite a few people have created solid packages including unlocking software, so that should be easy.

I've hypothesized that this half-unlocking we have also plays a roll in our inability to delete "system" files.  I haven't had a chance to explore it myself, and the US Audiovox SMT 5600 community is relatively small compared to the UK c500 community, who prefer to agonize over how they get new phones two months after France and contemplate the upcoming c600.

And, yes, I'm quite bitter that the Typhoon is still considered one of the US' best phones at $250 despite its' upgrade being FREE in the UK.

~Abecedarian

okie just unlocked my smt 5600 and then a store 5600 .. it worked great.. thanks to all the people who made it possible

now as for what i did
1. run the AE-CONFIG
    follow the all the prompts in the read me
2. run the SPV-SERVICES
    a. move the CERT.cab file to the phone. run the cab
    b. then run the spvservices.exe follow the prompts> then unlock it.

below are the files just to make it easier

I am having trouble unlocking my Audiovox 5600, any help would be appreciated, for some reason the threads here don't help or I don't know how I am not following them correctly.

Phone: Audiovox 5600 (cingular)
My sim and plan is T-mobile

Phone says "Network is locked. Please input unlock code."

now as for what i did
1. run the AE-CONFIG
    follow the all the prompts in the read me
2. run the SPV-SERVICES
    a. move the CERT.cab file to the phone. run the cab
    b. then run the spvservices.exe follow the prompts> then unlock it.

In my testing, I found that AE-CONFIG did nothing to app unlock my phone.  The apps in resetsecurity.zip (you can find this if you search around) WILL app unlock the phone, and if you reverse the XML file value from a 1 to a 0 (maybe vice versa), you can relock the phone.  This seems to be the safest way to do so.  I looked at the registry hacks in the XML file in No Warez, and it looks a bit dangerous.  Resetsecurity.zip (via the Rapiconfig.exe program) looks to be the cleanest way to unlock it (AT&T 5600).

I also played with an Orange image on my phone; resetsecurity did NOT work on it, but this did to app unlock it:

I have attached the Smartphone registry editior. You unzip the regeditSTG.zip file and copy the unzipped file to your phone using ActiveSync, then run the registry editor on your phone.

Then change the following values to:
HKEY_LOCAL_MACHINE\Security\Policies\Policies\00001001 = 1
HKEY_LOCAL_MACHINE\Security\Policies\Policies\00001005 = 40

And now your phone is app unlocked!

(this from http://www.modaco.com/index.php?showtopic=...gitally+signed)

Not sure if AE=-Config works on the Orange image or not.  I couldn't get it to run because my Orange imaged phone was app locked more securely, but the registry hack unlocked it.

(1)  Introduction

Over at the SPV-Developers' Board thread on unlocking the Audiovox SMT5600, Cyberdim offered up advice on how to unlock the Audiovox SMT5600 using the SPV-Developers' free C500/C550 SIMLock Toggling (FREE) tool.  While Modaco previously had a post on the Free SIM unlock for the SPV C500 from SPVdevelopers.com, it didn't really do much for those of us in the states.

I haven't actually tried Cyberdim's advice on my own phone yet, but did follow up with a list of links to the files he suggested.  My general impression right now is that the SMT5600 is actually application-locked, but merely a different type.  I'll discuss this later, after going through the juicy parts.

Without any more ado...
(2)  Cyberdim's Advice:

It is worth noting that this is not targeted at the Typhoon (Audiovox SMT 5600 / Orange c500 / etc) model, but it wouldn't surprise me if it still works.

Another version can be found on a post at pdamobiz.com,  D/L SmartPhone Program ( http://www.pdamobiz.com/forum/forum_posts.asp?TID=19034 ).  This site also seems outdated and legit.  I haven't downloaded it, however, and don't know whether it contains the same zipped files.
(4)  resetsecurity.zip

I found two downloads for this, each a bit different.  It should be noted that neither contained a manual.

  {i}  Modaco -> How do you set up hotmail on the phone??

This file contains ResetSecurity.exe, a 4 KB executable.  No manual is included.

I have no clue whether it actually works.  The post explains a little bit about how it works, and apparently some found the results satisfactory.

  {ii}  Motorola MPx220 and Audiovox SMT6500 "app locked"?

This file contains CheckLock.exe (4 KB), RapiConfig.exe (49 KB), and ResetSecurity.xml (1 KB).  No manual is included, but most of the post  itself is fairly informative.

I have only tried the CheckLock.exe program, which did work (results below).  Y'all are free to try the rest of them and let us know how they work.

I have no idea if there is any significant difference between these two downloads, but my instinct is that there isn't.
(5)  Questions

I trust that these will work, and am looking forward to trying them once I get a replacement dust-free phone.  However, I am not sure if there is a major difference between the two.  From the Modaco posts and the No Warez manual, both programs seemed geared towards app-unlocking smartphones.  What I don't know is:

  {i}  How are they different?
  {ii}  How does No Warez.exe work?
  {iii}  Are both needed, or is it redundant?

Not the most pressing questions, if - as Cyberdim claims - used together they get the job done.  Just questions that could yield other insights.
(6)  Inferences/Insights

I tried CheckLock.exe, and it informed me that my phone (which uses the AT&T ROM) is application locked.  I am quickly coming to the conclusion that the SMT500 is locked, although in a slightly different way.  I've had a fairly long thread with pzee, and am starting to think that this could purely be the result of some "special" application lock that applies only to the Audiovox SMT5600.  I am curious whether an application locked c500 user is able to use SPV-Developers' tool and/or delete 'system' files using their computer.
(7)  Testing

I strongly encourage everybody who plays with these to post their results.  Even if this doesn't work, we can spend a little time hacking away at solving this

And, of course, there are plenty of other methods of application unlocking phones (I think).  For example, pzee posted about how he created an explanatory image.

Feel free to post anything you know that works on the SMT5600.  SIM Unlocking or exploring how the SMT5600 is application locked (or not).  Better yet, take the opportunity to go all theoretical.
That's all, and kudos to Cyberdim for giving we Yankees some hope.

~Abecedarian

That's great!! Thanks for you method,my audiovox smt5600 is back..

okie just unlocked my smt 5600 and then a store 5600 .. it worked great.. thanks to all the people who made it possible

now as for what i did
1. run the AE-CONFIG
follow the all the prompts in the read me
2. run the SPV-SERVICES
a. move the CERT.cab file to the phone. run the cab
b. then run the spvservices.exe follow the prompts> then unlock it.

below are the files just to make it easier