[Galaxy S III Original Android Development] curiousrom:
Re: Iliad Italia SIM Problem - No Voice & Modems

Do not install old modems that are not in the EFSv2 Modem Collection. It's a question of compatibility with the crucial EFS partition.

As I mention in the post I linked to above I9300XXUGOK1 is the most recent modem for the S3 i9300 and [MENTION=8622529]heisenmark[/MENTION] says that it works fine with his Iliad Italia SIM on LineageOS 14.1.

You also installed the most recent modem for your country/region/network as mentioned in that post which is I9300XXUGNB1. So I don't think that it is a modem firmware problem.

"Iliad SIM works fine on a Galaxy S2 (i9100, with both stock and custom firmware) and on a Galaxy Trend Plus (S7850, with stock firmware)" - Is that your exact SIM tried on other phones or an other Iliad SIM?

The fact that you installed "I9300XXUGOE1_I9300ITVGOE1_ITV stock firmware (XXUGNB1 modem)" and it still does not work points to:

- Maybe a SIM problem or your IMEI listed as bad in Iliad Italia's database or a ConnectivityService or registerNetworkAgent problem which can be found in a Logcat.

For example after toggling on/off Airplane Mode w/ 3G data enabled, WiFi off I can see in Logcat: D/ConnectivityService( 2380): registerNetworkAgent NetworkAgentInfo{ ni{[type: MOBILE[HSPA+], state: CONNECTED/CONNECTED, reason: connected, extra: kolbi3g (my network provider), failover: false, available: true...

As suggested above call your operator's support preferably with the stock Samsung 4.3 firmware installed w/o any user app installed so they can't blame it on LineageOS. I had suddenly some connectivity problems on my S3 i9300 running a custom ROM based on Samsung 4.3 a while ago & a new SIM fixed the problems.

- A hardware problem as installing a stock Samsung firmware rules out possible problems related to LineageOS. The modem chip could have some bands not working. Which network bands is Iliad Italia using?

In Settings > About Phone > Status > IMEI information > is it identical to the IMEI on the sticker under the battery? Edit: What is the exact phone model number on that sticker?

With cellular data enabled, WiFi off in Settings > About Phone > Status > SIM status what is the Signal strength? Note that the lower the better and the maximum is around -50 dBm and -110 dBm is no coverage at all. You can also see the Service state and note that not all SIM show your phone number.

The cell modem antenna of the S3 is in the bottom so if facing a cell tower you will get a better signal if holding the phone by pinching the top & bottom with your hand on the side instead of behind it therefore having your hand in between the cell tower and the phone.

[MENTION=8622529]heisenmark[/MENTION] could you also post a SIM status screenshot with your Iliad Italia SIM card and Thanks :good: for jumping in the conversation. :cool:

The other screenshot was made with the free app Network Cell Info Lite. Edit: [MENTION=6520725]vege666[/MENTION] in 3-dots > System info/feedback you can tap Feedback on the report and change the email and send to report to yourself instead of the app's dev email. That report may be helpful when taking with your network's support.

What happens if in Settings > Wireless & networks > More > Cellular networks > Preferred network type > and select 2G?

Settings > Wireless & networks > More > Cellular networks > try turning on roaming while on 3G.

Settings > Wireless & networks > More > Cellular networks > Network operators > Choose automatically should be selected normally but try the refresh arrow top right to get some choices under Available networks.

What is your TWRP version? Did you do a clean install as described in S3 i9300 LineageOS Super Clean Install & Samsung Firmware including Format Data?

Please report back if you fixed your problem or not. :cool:

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