how to change number phone in sim800a modul by sms
What have you tried?
Post the program that represents your best attempt and tell us what it actually does and what you want it to do that is different.
...R
ducquy113:
how to change number phone in sim800a modul by sms
Which phone number? The one that you send messages to? Or the one assigned, by the SIM card provider, to the SIM card?
You can change the former. You can NOT change the latter.