Hello everyone,
I am consistently getting a CME 31 Error when trying to do anything related to call forwarding…
Whether it is the following AT commands:
AT+CCFC=0,0
AT+CCFC=0,1
AT+CCFC=0,2
AT+CCFC=0,3
AT+CCFC=0,4
The commands do eventually go through but there needs to be tons of retires in order for it to work… This is an issue because the hardware will be used in conjunction with a web application we’re developing.
Firmware: EC25AFXGAR07A04M1G
Hi @john_shamamyan
As shown in the screenshot, you need to register the call transfer number before other commands can be executed.
The order of the AT commands do not make a difference. The issue is that the network is timing out. Now why they are not processing the call forwarding request is my concern.
This happens primarily on the T-Mobile network. If I send the same AT commands in ANY order to an AT&T network, then it gets processed immediately on the first try!
When a mobile phone sends out supplementary service commands they work immediately on T-Mobile which makes me wonder why the EC25 is being hit with so many timeouts.