Unlocked BA sim invalid error - Upgrading, Modifying and Unlocking

I have a BA that is unlocked and happily runs Orange, Vodafone, O2 sims. But when I try a 3 sim I get the error: sim invalid.
I get the same message when there is no sim in it. I checked the sim contacts and all looks fine. And the sim works fine in my ordinary 'phone' mobile.
Any suggestions for a fix to the problem?
Thanks

OK. I'll answer:
Three (3) don't own any GPRS network so they have locked their sims from roaming onto any non 3G network. Else it costs them money.
So any 2G/2.5G device (BA etc) will not accept a 3 sim. Some people have found theirs to work for a short period until 3 see the non-3G usage and take action.

Related

Three PAYG SIM not recognised?

Anyone tried this? My Excalibur is SIM unlocked and works with a selection of non-3 SIMs, but using a PAYG SIM from 3 says SIM not found (or words to that effect). But, the 3 PAYG SIM works fine in my Nokia N95. I notice that the SIM pinout is different (3 has only 6, but Vodafone and tmobile have 8). I confess I didn't realise that there were still 2 types on SIM in circulation 'cos I thought that all SIMs would work in all mobiles (assuming they're unlocked and all that) these days? I am I just being naive?
Yeh I believe the 3 SIM is for 3G phones only. Whereas the other carriers' sims work in 2G and 3G phones.
When there are no 3G cells in range a 3 phone is supposed to revert to T-mobile's 2G network however I guess they decided to prevent 2G phones doing this as it could get expensive for them if too many customers are using the out-sourced network perhaps.
Cheers for the reply. I since also tried it in an unlocked N73 (a phone that 3 sell or used to anyway) and that can't see the SIM either. So, I reckon it's time to call 3 and tell them I have a dud!
The think that gets me is that the SIM is a different layout to all those I've seen before, but the SIM-only deal says "if you want to keep your existing phone, get a SIM-onloy deal and provided the phone is unlocked, you're good to go" (or words to that effect). Hmmm... I'm not so sure.
One final question: I've hunted around for SIM specs but all I can find is a Russian site giving the PIN layouts of a couple of SIMs. But, can someone point me to a site that lists what kind of SIM (pin layout) is used with which kinds of phone?
EDIT:
Ahh - I thought I was getting one of these:
http://en.wikipedia.org/wiki/USIM
but I actually got one of these:
http://en.wikipedia.org/wiki/RUIM

S4 Mini Duos - Vodaphone Network Issue - Need Help

Hi All need help:
I have bought S4 mini Duos in India. I have put 2 SIM SIM 1 Vodaphone and SIM 2 Airtel.
I have problem with Vodaphone SIM. Even though the Vodaphone SIM have full network in my phone Callers can not connect to the Vodaphone SIM. Number unavailable for callers. This issue occurs 6 out of 10 times.
- Any one else have this issue with Vodaphone SIM?
- How to resolve this? Issue is with Vodaphone SIM only Airtel is fine.
- 3g is avtive in Airtel SIM.
- I have changed the Vodaphone SIM to SIM 2 but the same issue is there.
- Nwtwork drops it will reconnect automatically no issue in that.
- Only call can not connect to Vodaphone SIM.
Any solutions? Should i return the mobile?
vodafone sim network problem
livetech2 said:
Hi All need help:
I have bought S4 mini Duos in India. I have put 2 SIM SIM 1 Vodaphone and SIM 2 Airtel.
I have problem with Vodaphone SIM. Even though the Vodaphone SIM have full network in my phone Callers can not connect to the Vodaphone SIM. Number unavailable for callers. This issue occurs 6 out of 10 times.
- Any one else have this issue with Vodaphone SIM?
- How to resolve this? Issue is with Vodaphone SIM only Airtel is fine.
- 3g is avtive in Airtel SIM.
- I have changed the Vodaphone SIM to SIM 2 but the same issue is there.
- Nwtwork drops it will reconnect automatically no issue in that.
- Only call can not connect to Vodaphone SIM.
Any solutions? Should i return the mobile?
Click to expand...
Click to collapse
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Dude! i too had the same problem.
sim1 vodafone had network drop and 3g network suddenly goes lost.
sim 2 airtel worked fine.
took the phone to samsung service center. they said its problem with the antenna reception.
they replaced the mother board to new one and phone works fine now.
everything was covered under warranty... great relief...
kichaz!!

Oppo find 7 phone not able to detect all network sims cards

My oppo find 7 is 5 months old, was using a vodafone sim in india and was working fine ,when went out of town and entered different area the sim stopped working. Then when i came back to my service area then also the sim was not detected by the phone. Tried different other network sim like airtel, aircel, it did not work, only idea sim was recognised by the phone. I do not know how make my phone detect vodafone network, please advise.

Error while searching for networks

Hi,
I recently received a new unlocked verizon samsung note 4.
Since I live in Israel, I inserted a local SIM card but for some reason I get the above message.
No network, no calls.... Just a very expensive brick....
I tried hard reset, switching SIM cards from different networks, and nothing.
Please advise....

"Invalid Sim Card" only when overseas

Hello,
I had my M8 replaced under warrenty and received a brand new M8. I am in Australia and use the Telstra network, and they provide network unlocked phones for plan customers, thus this phone isn't network locked.
When I first got it, it kept saying "Invalid Sim Card" on the lock screen for 2 days, and it went away by itself. The tech at the store said at that time they had significant network problems and we're resolved at the same time my phone was playing up. In those 2 days I also replaced the Sim Card and it made no difference.
Flash forward 4 weeks and I went overseas to Germany and the phone worked fine for a few days then again said Invalid Sim Card. No matter how many times I rebooted it I couldn't get it onto the network. Once I returned to Australia it worked fine.
I am now in South Africa and my Australian Telstra Sim Card was working fine but I needed a local number for data, so I purchased a Vodacom sim with data only and it worked straight away. My girlfriend also brought a Vodacom sim for her M10 (same Telstra plan as me) and hers is fine
My sim and phone ran on their networks fine for 12 hours and I wake up this morning and it's now saying "Invalid Sim Card" again. I've tried rebooting it several times with no luck.
Does anyone have any ideas?
I'm not convinced it's the Sim Card tray as it works fine on Australia, only when overseas. I don't know anything about the radio or baseband stuff but it's that related?? What can I check??
I used the IMEI24 website to confirm the phone was unlocked from the carrier, and entering *#*#4636#*#* doesn't show any info as it's not on the network.
Phone is currently unlocked, S-on, TWRP 3.0.2.0, rooted, Marshmallow.
I'm pretty angry as I have an ultra marathon in 2 days, and this phone was to connect my Garmin watch to the internet so my friends and family could track me, and most importantly my girlfriend could find me at the finish.
Any help would be greatly appreciated.
Thanks!
matticas said:
I don't know anything about the radio or baseband stuff but it's that related??
Click to expand...
Click to collapse
I doubt it has anything to do with radio baseband. GSM bands are pretty standard worldwide, and just about any "quad band" (850, 900, 1800, 1900) GSM phone should get you at least voice and EDGE data services. And all M8 versions support those GSM bands. Therefore, any M8 should get you at least GSM service, regardless of the radio baseband installed.
I wonder if the issue is the SIM modules themselves, and the "overseas" issue is a red herring? My thought is, that maybe the overseas SIMs you purchased don't quite fit as well as your local (Australian) SIM. One thing you can try, is put some Scotch tape on the SIM (on the side without the gold contacts) and see if that "fattens" up the SIM enough to make better contact. Be careful not to get tape stuck in SIM slot/tray. I've seen this trick work for some folks with the Invalid SIM error.

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