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Fix issues : Call and SIM issues 331
4.
Check if a software update is available for your phone.
5.
Reset the phone.
Consistently busy signal
Outbound calls
1.
If you hear a fast busy signal when you call a number, all cellular circuits may be in use, preventing the
call from going through. Try calling again later.
2.
If you hear a fast busy signal every time you call the same number, your number may be blocked by an
app. Try calling from a different number.
Incoming calls
If you have a signal and can make calls but callers tell you they consistently get a busy signal when calling
you, check that you haven't blocked their numbers.