unlock/sim problem

[mindblown]

i need help
i just bought an iphone 4 and recently jailbreaked/unlocked it for tmobile, so i inserted my tmobile sim and it works fine, but when i turned off the phone and turned it back on, i dont get any signal after, the tmobile carrier is not showing on the screen and i just have 1 bar
and when i take out the sim and reinserted, it says invalid sim/sim failure.

but when i reboot(using the sbsettings), and instead of turning off the phone and turning it back on again, the unlock works, No invalid sim/simfailure message showing and tmobile carrier logo is on but then again i turned off my phone and turned it back on, then all those failure things reoccured.

[dinesh-valmiki]

hmm once reinstall the ultrasn0w again. It might help you.

[mindblown]

well..., i do have an old tmobile sim card

[pr23]

try installing the Hacktivation patch, follow the instructions here, maybe it fixes your problem...

How To: Fix ?Different SIM Detected? [Hacktivation Patch v1.1]

[mindblown]

i didnt use a phonebook sim to activate, i used an at&t sim
i think its just an unlock malfunction

[Captain Skyhawk]

Just curious, why r u turning it off and on so much. I never turn my phone off.

[mindblown]

Some packages from Cydia requires a reboot
Sometimes I drain the battery

[ballin3]

i have the same problem my friend. It's weird. I notice sometimes i have to reboot the phone 3 or 4 times to get it to pick up the t-mobile signal.

[allanes5]

i have the same problem my friend. It's weird. I notice sometimes i have to reboot the phone 3 or 4 times to get it to pick up the t-mobile signal.

I also have the same problem and it's starting to get really annoying.

I also get 1 to 2 signal bars in the same place whenn sometimes I get 4 to 5 bars.
If i try making a call with one signal bar I lose phone functions and have to reboot again sometimes many times.

I also notice that I lose my 3g service and have to reboot to get it working again. Again sometimes I have to rebhot 3 or 4 or more times.

I never had this problem with my 3gs.

Anybody know what's up with this? Will installing the patch make it better?

[Poseidon79]

Make sure 3G is off in settings. Don't install any activation "patches" as those are not for newer devices.


Sent from my iPhone using ModMyi

[Bouzo]

I have similar problems.

iPhone 4 iOS 4.0
ultrasn0w 1.1
hacktivation patch

My regular carrier is FIDO but I needed the hacktivation patch because after unlocking with ultrasn0w my phone would not accept other sims (it would tell me to connect to iTunes) until I applied this patch. I use a T-Mobile card when in the US and Telcel card when in Mexico.

Almost every time I reboot my phone, I will lose my signal. As described above, it shows 1 bar, no carrier logo, and eventually says no signal but it will stay with the 1 bar for quite some time (it just shows 1 bar but really I have NO SIGNAL, CARRIER LOGO IS GONE).

I also have this happening randomly even when my FIDO sim is in and I am not doing anything with the phone. I'll suddenly drop to 1 bar, lose the FIDO logo, and have a dead phone in some cases 30-40 minutes before I can restore my signal either with multiple reboots or just waiting it out.

I suspect this has something to do with the hacktivation patch that's required but I am not sure.

I really want this issue figured out.

[Bouzo]

As a follow up, I can confirm the issue lies with the hacktivation patch. My phone yesterday suddenly lost signal and carrier logo and dropped to 1 bar. I immediately booted up Cydia and removed the 'hacktivation patch' my signal was instantly restored.