I am a computer science student and I am a newbie in electronics.
I have designed a PCB for SIM800L, and I forgot to change the trace width of the copper rails. By default, the routing width was set to 0.254mm. Now once my PCB arrived I have soldered all the components to the PCB, and I have found that my design failed.
I suspected on the trace width of the PCB because since SIM800L module doesn't come with an onboard voltage regulator, an external power supply adjusted to the voltage between 3.4V to 4.4V (Ideal 4.1V) is required. The power supply should also be able to source 2A of surge current, otherwise, the module will keep shutting down.
Unfortunately, this has happened to me as well. So as I have no prior experience in PCB designing I just wanted to confirm whether it is because of the routing width or else there is any other reason for that.