Help Not your everyday "Your SIM card does not allow a connection to this network" problem.

[yukifujita]

Hey guys!

So, I can clearly see this "Your SIM card does not allow a connection to this network" problem is quite common around here, so here we go.

After one year of normal use, I got my problem one day ago, no connection whatsoever since then.

Tried shutting it down, removing the battery and switching back on after 20 minutes.

Tried my sim card in another phone - Works fine.
Tried another sim card, from the same operator, in my phone - Works fine (WTF)

I then called my operator (it's a Brazilian operator so no matter mentioning it now) and of course, no solution. Payment is fine, everything normal.

So I wen't to my operator store and replaced the sim and... Still doesn't work!

I then borrowed a sim from another operator and... Nothing! No signal!


And just now, I realized that, when I change to "GSM Only" it works! The thing is I have an unlimited 3G plan, and use it a lot, this is not a solution for me.

I've always used my phone on "WCDMA Only" or "WCDMA Preffered", but when I switch to those, or to anything other than "GSM Only", it dies, no signal, even with GSM Auto...

I tried hard resetting, nothing helps here... I have no idea what to do next.

When on WCDMA Only:

Signal Strength: -71 dBm 21 asu
GSM Service: Emergency calls only
GPRS Service: Disconnected
Network Type : unknown



I bought the Phone brand new on eBay (or rather a brazilian version called Mercado Livre) and it's clearly from the UK (i can see from its plugs) but it's unbranded and unrooted, but unlocked.


Also. I heard this may happen with stolen phones, blacklisted IMEI's... How can I figure this out? And how does that explain the fact it works under GSM only?

 

[yukifujita]

Just searched my IMEI on different databases, doesn't seem to be stolen.

 

[SB13X]

Only thing I'm reading into here is that either there is a 3G network issue from your operator so if you have it set to WCDMA only the phone will try and roam to another networks mast and BAM it shuts you out. Either that or your operator has restricted 3g access on your contract. Those are the only two options I can thing of I'm afraid.

 

[yukifujita]

Only thing I'm reading into here is that either there is a 3G network issue from your operator so if you have it set to WCDMA only the phone will try and roam to another networks mast and BAM it shuts you out. Either that or your operator has restricted 3g access on your contract. Those are the only two options I can thing of I'm afraid.

Not the case, man =/

I Tried a different sim, with another line, and it worked fine.
Tried contacting the network op, everything is normal.

 

[yukifujita]

This is swelling my brain to the point I think it's gonna blow.


My Phone Sim Card (TIM Network) - Works on any phone, and works in my tablet, but not on my DHD.

My Tablet Sim Card (VIVO Network) - Works on my phone, and work on my tablet.

My friend's Sim Card (TIM Network) - Works on his and my phone fine.


So my DHD will work with ANY but my sim (which was replaced for a brand new today, with the same line)

And my sim will work with ANY device but my phone.


Oh my head....

 

[CuBz]

I've heard this problem happen for quite a few Android users. The only fixes (or not) I know of are...

Turn Aeroplane mode on, then off continuously until you get a 3G signal. If you still don't get connected, take your battery out, wait 15 minutes, put battery back in and it should connect.

If neither work then I know of nothing more you can do.

 

[SB13X]

See if ensuring you have all these APN's setup:

G1 TIM Brazil APN settings

 

[Deleted User]

Hello

I had a very similar issues about 4 months ago although mine seemed to be location specific in that it happened when I stayed at my sister's. I'd get to certain point on journey to her's and my signal would just disappear. The network provider insisted there were no mast/signal problems. My sim worked in other smart and dumb phones and other sims worked in mine. I got a new sim and that made no difference. At home signal was intermittent but mostly ok. This went on for about 6 weeks and I was on verge of sending my phone back to HTC. As a last resort I backed up all my data, performed a factory reset and then deleted my APN settings and restored the defaults and made sure my signal was set at GSM/WCDMA.

I'm not sure what specific action worked, if any, but my signal came back and has stayed back