Network call/messages problem.

Hello @B89,

Could you check this :
1. Open the SETTINGS application
2. Open the CELLULAR DATA menu
3. Open the SIM APPLICATION menu
4. Select SIM CARD VOO
5. Open the SELECTION MODE menu
6. Select "Automatic and manual mode" (you are then switched to "VOO SIM card")
7. Select VOO SIM CARD
8. Open the REGION menu
-> In Belgium you must select REGIONAL, outside the country (France for example) you must select GLOBAL.
9. Restart your smartphone

Hello @Nicolas O

Thank you for the quick reply. 

I tried all of those settings. Sometimes phone connects to the network but after a few seconds, it disconnects, and "No Service" on the status bar.

I have another e-Sim activated on my phone. Another problem is it disconnects both SIM and e-Sim. Very strange problem. I tried deleting e-Sim, resetting network settings, and even factory reset, but nothing helped. 

Is there any other option? 
My phone number ends with ...322.
Thanks in advance.

@B89

You should try the SIM card of someone you know to see if the problem does not come from your smartphone.

@Nicolas O 

I have an e-Sim that works just fine. When I insert a VOO sim card, it disconnects both sim cards. My e-Sim is MTS Serbia connected to the OrangeB network and working fine. 
My wife uses the same combination of sim and e-sim cards and no problems. She is using iPhone SE (2020). 

Can you put your wife's SIM card in your phone to see if the problem is the same ?

I tried that on first attempt to activate my sim. Hers did not work on my phone, and mine worked on hers. So. On her device, both sim cards are working, on mine-none. 

This combination on my phone worked fine for almost 30 days. And just stopped working. I'm not sure what could happen.

@B89,

I'm sorry, from the description you give me of this problem, it seems that the problem comes from your smartphone.

Ok. What are my options? Can anyone help me? Or do I have to change my device? The thing that bothers me the most is that sim was working fine. I read about possible solutions on this forum that I can ask VOO to change my reception antenna provider from Proximus to some other provider or reverse. Would that help maybe? What do you think?

If neither SIM card works in your phone, changing the antenna will not help.
It is better to see this problem with Appel, because your SIM reader seems to be defective.

I just tried my friend's sim card. Works fine. Screenshots are

in attachment.

One more interesting thing is that I managed to set connection parameters manually and my phone connected to LTE network with internet access and no calls/SMS. As you can see on the picture below.

@B89, We could try to change your SIM card, I can send you one by post.

Ok. Let’s try with new sim card. It’s for phone number ends 322.

Thanks Nicolas.