First off, thank you Virgin-Sim for providing samples to people on this forum. Not only that, but shipping it extremely fast to us and providing us even with updated ones.
Phone's tech specs:
iPhone 3G version 2.1
1.45.00 modem version
T-mobile USA located in Massachusetts
Edge using epc.tzones.com APN
Tested for One week.
Edge On, 3G off, Data Roaming On
I received the virgin sim samples a week ago and have been rigorously testing them ever since. My location is perfect since a) I had a dead zone in my bathroom where I lose signal completely and b) Have to drive to school where I lose signal due to dead zone and c) Jump to different cell towers on the drive there.
First impressions:
Virgin-sim was kind enough to send me two different samples. A high speed version and a normal speed version. Both were the low-profile new sim design a lot of the competitors are now releasing which require
NO CUTTING to your sim. The IC chip is located on the other side now.
I quickly tested the normal sim, which was very similar to my Universal Sim v550 in terms of usage. Stuck it in, waiting around 10-20 seconds for it to find signal. Other users report that one upside to the virgin sims on the T-mobile USA network is that it does not lose edge - which was one of the downfalls of the Universal Sim v550, you could randomly lose edge connection (especially after losing and regaining cell signal) and would have to reboot to regain it.
I then tried their special "high speed" virgin-sim (denoted with a red line at the top), and it amazed me. I followed their instructions to power down the phone first, and then stick it in. Upon finishing booting, it had already found full T-mobile signal! Normally (with the Universal sim, normal speed virgin sim, and i-smartphone) it would have taken 10-20 seconds after booting for it to find signal.
After purposely losing signal (for at least 5 minutes) and switching cell towers multiple times, the high speed virgin-sim found signal right away right when I left the dead zone, which again, would take 10-20 seconds on a "normal" sim, and sometimes you would still have "no signal" until you reboot the "normal sims." For the past week, I have not lost edge (while still having reception) at all, even after losing and regaining signal, the data connection was up and ready right away.
I gave the Pinpoint A-GPS and Cell tower\wifi triangulation a try and both worked flawlessly. If I was outside, with a clear overhead of sky, it would pinpoint where exactly I was located. Indoors, I would get a good triangulation estimate.
Problems:
Unfortunately, these sims still fake the IMSI, and it may cause problems in some countries.
You must jailbreak\quickpwn\pwn your phone and select "ACTIVATE PHONE" or you will have to ssh the activated lockdownd. Here are my old instructions if you didn't select activate during pwn-ing:
You can grab an activated lockdownd at:
http://rapidshare.com/files/144248180/lockdownd.html (2.0) -
http://rapidshare.com/files/151333747/lockdownd.html (2.1) SSH to /usr/libexec on iphone and rename the current lockdownd to lockdownd.old and move the new lockdownd over and make sure it has 755 permissions.
If you do not activate or copy over the new lockdownd, you have to either a) turn on airplane mode or b) take out your sim every time you want to sync in iTunes, otherwise you get a "Cannot recognize sim etc etc" error.
This brings me to the next point, airplane mode. If you turn on airplane mode, to regain signal, you have to turn it off and reboot the phone. Unfortunate, but not a big deal as most will never use it. I can only see this being a problem and a big waste of time for people who do not want to jailbreak their phones at all (don't ask me why they wouldn't, I have no idea).
Other users are having problems with the high speed version. It seems that the people that have problems with the high speed version are the ones with newer carrier sims. I did receive the new test samples today that were supposedly supposed to fix this problem, but I have no way in testing it since all of my sims have worked fine.
Here is what Virgin-sim had to say about the issue:
Be on the lookout for other reviewers that have had this problem - they will test the new sample soon enough.
Conclusion: As of now, the high-speed Virginsim seems to be the "best" solution out in the market. It beats every other sim I've tried in speed and the Edge reliability is high. Therefore, you are less likely to have to reboot after losing signal or changing towers.
Final Results:
Virgin-sim "High-speed: (9/30/08 - fw2.1):
calls, sms, data in/out:
working
GPS:
working
Signal Loss:
NO
Random Data (Edge\3G) Signal loss:
NO
Final Verdict:
PASS - Working since 09/30/08
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