So i have a sim900a module.
i m using it through software serial on arduino uno for mqtt project.
I tested the module by sending “AT” an it returns “OK”.
i can call receive messages form both sides.
The problem it that it does not connect to the internet.
i was lucky once and had it connected to internet but after that no luck.
i have tried 2 different sim’s of “airtel” both had internet and calling packs.
also after i disconnect a call to the module it shows “NO CARRIER”.
(attached screen shot)
can anyone help ?