mhmd_saud
Newbie level 2
Hi
I'm facing a problem with my module
it running good without inserting the SIM card but when I insert it in a place where there is a network coverage, it return "Call Ready" and goes to restart periodically but if there is no coverage it operate normally as there is no sim card
I made two designs for the sim card holder but both gives the same problem
those are my designs :
the second
Please note that i didn't connect the ESD in the designs
is the problem is in the design or there is another cause ?
while i think that the problem isn't in my design but i don't know what happen exactly when network detected which make it restart.
I'm facing a problem with my module
it running good without inserting the SIM card but when I insert it in a place where there is a network coverage, it return "Call Ready" and goes to restart periodically but if there is no coverage it operate normally as there is no sim card
I made two designs for the sim card holder but both gives the same problem
those are my designs :
the second
Please note that i didn't connect the ESD in the designs
is the problem is in the design or there is another cause ?
while i think that the problem isn't in my design but i don't know what happen exactly when network detected which make it restart.