AIR780E Relay SMS issues

[clauvers]

I purchased an AIR780E relay development board. A simple one.
I managed to get the tool working to upload the firmware to the device and to upload a lua script, which seems to execute well.
I have inserted a regular mobile phone sim card with calls/sms/data. I have actually tried different sims from different providers.
The issue is as follows: when I send SMS to the sim phone number and my lua code is waiting for an sms, the callback never triggers. When I place the sim in an android phone the sms immediately comes through. As if it was never requested by the AIR780E device.
When I try to send an sms it indicates all went well and the sms was sent but actually it was never sent.
The network connection looks ok.
I could not find a lot of information on these boards and on people trying to make these work.
Does someone has experience or ideas how to trouble shoot this ?

[wendal]

什么sim卡? 哪种网络? 手机号码带上国际区号了吗?

[clauvers]

Thanks for answering.
I think the AIR780E boards are not made for VOLTE networks. I am in Israel, and all networks here are VOLTE.
It looks like there is a connection and SMS sending return OK but actually no SMS arrive nor leave.
I am very interested if these boards an work worldwide with "any" operator, as they are cheap and the luatos is pretty nice and fluent for programming.
I was not able to get data as well, the firmware seems not to include many libraries like http, socket, ... they simply are not there.
I did not decide to move away from this platform but I am looking to alternatives.