Question BIG PROBLEM WITH SAMSUNG A40 A405FN

[ferguson1951]

Hello everybody.
My mobile detects SIM card and network operator but when I try to make a call does not ring towards the outside
I have tried everything that was in the Web for 3 days, including flashing new Android 11. Mike and speaker work.
Any chance that someone can fix this?
Thanks a lot and best regards

 

[B. Diddy]

What carrier in which country are you trying to use it on?

 

[ferguson1951]

I am using a Vodafone Italian SIM in Portugal but it always worked until I had this problem.

 

[B. Diddy]

Can you describe exactly what happens when you try to make a call? Does it show the calling screen, but you don't hear it ringing through the earpiece? Have you confirmed with the person you try to call that it didn't ring, and they didn't even get a Missed Call notification?

Or does your Phone app immediately return you to the dialer screen (or crash) after hitting the Call button?

 

[ferguson1951]

Yes, it shows the calling screen for some time and then the call is ended but there is no ringing. It doesn't crash immediately. The calling screen disappears after some time.

 

[mustang7757]

Is this a dual sim device? Are you using both sim slots?

 

[B. Diddy]

Yes, it shows the calling screen for some time and then the call is ended but there is no ringing. It doesn't crash immediately. The calling screen disappears after some time.

Can you test it by calling someone right next to you, just to make sure there is absolutely no ringing or notification on the other phone?

 

[ferguson1951]

Now the phone is not charging either. I guess it is too old and ready for the "dustbin". I apologize for wasting your time. Thanks a lot for your help anyway.

 

[B. Diddy]

Oh well. Hope the replacement works better!

 

[ferguson1951]

Dear friends, just now I have a bright idea, for a change: I replaced the motherboard with another one that I had and now the phone works again and charges but has the same old problem, no outgoing calls. Can we go back where we were and try some solution?
Thanks a lot and best regards.
Your Italian friend.

 

[B. Diddy]

Ok, then go back to my previous suggestion -- can you try calling someone right next to you and see if their phone even gets a missed call notification?

 

[ferguson1951]

Unfortunately I wouldn't know how to do it because I am here in a Portuguese village since september and I do not have any friends yet. At least I do not have anyone who has given me his phonenumber

 

[mustang7757]

Try going to settings>connections>mobile network>APN upper right corner tap reset to default

 

[ferguson1951]

Yes, I rang my former hotel which is quite near my home but no ringing

 

[B. Diddy]

The next simple step to try would be to contact Vodafone and ask for a replacement SIM, in case this one is faulty.

 

[ferguson1951]

Thank you. No, I am positive the SIM is not faulty. Apart from that, when I tap Networks (my phone is in Italian) and then SIM card Manager I see that Calls and Messages (SIM 1) are in grey writing instead of black. Nothing: the SIM is detected, the network is registered but no outgoing calls. Very funny.

 

[ferguson1951]

I found online exactly my problem on the Samsung forum and Samsung's reply is this: (I cannot use Samsung Members because I have no network). I am beginning to think that the SIM is detected but defective or maybe the SIM slot is not OK:
Dear Samsung Member,

Greetings from Samsung Customer Support!

We acknowledge your query and apologize for the same. As one of the SIMs is not getting detected. Please check the SIM slots using the Samsung Members application if the SIM slots are working or not. The steps are given below:
Samsung Members>>Get Help>>Interactive checks/Diagnostics option.

If the SIM slots are not working fine, please visit the nearby service center. The link is mentioned below. Using this you can get the details of the nearby service center.

If the slots are working fine, please check the SIM in the other device and register your concern in Samsung Members Application (Open Samsung Members Application > Get help > Send Feedback > Error report/Ask questions).

Thank you for writing to Samsung.

Warm Regards,
Samsung Customer Support.

 

[ferguson1951]

Nos Calls and Messages are no longer grey but black, the Vodafone SIM is detected but still no outgoing ringing
I added a Lyca SIM (Portuguese), now both SIMs are detected in the opening phone screen above left position, Dual SIM always on (it says in SIM Card Manager) but no outgoing ringing.
Please read also above messages.
Also, I went into Devices>Smart things and it says "There was a problem connecting. Try again" and when I tap "contact us" it says "Server error"

 

[B. Diddy]

You said you flashed a new ROM for Android 11. Was it intended for your exact model number? Flashing a ROM for a different model (even slightly different) could potentially cause problems.

 

[ferguson1951]

When I try to activate Dual SIM always on I get an error message that says "Call forwarding failed". The solutions I found in the Web do not work for me. Please also read above messages.