invalid input band kaise kare || sim toolkit error in application kaise hataye 

Sim toolkit ka opion to aa hi nahi raha hai

Yes

Then same process

In the setting of app backup apps allow show system app

@@himadrireang3654 sab kuch karne ke baad bhi sim toolkit nehi aaraha

😂😂😂

Mere ko to pareshaan kar diya is me 😢😢

Bhai install kar Dena phone memory Mein jaake phir se aur sms tool ka jo option hai yah delete Mat Karna phone memory se Nahi to fir se chalu ho jayegi Aana or phone off hone se bhi chalu ho jayegi Aana FIR phone Memory mai Jaake install kar dana phir se

In that app.. inside the setting you have ON the option "Allow system app".. Then you can able to see the sim toolkit when you search