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z ultra
antvirus avast moblie security
battery stamina mode always on(also tried in normal mode)
disable it or uninstall it > restart the phone > check again w/ stamina mode off
if that doesn't work then try on safe mode
I already did those steps but still it shows that message and I do not know that is there a safemode available in lollipop
Same error message shown in safe mode too...
BTW thank you for showing me to boot in to safe mode...
You might want to check with your carrier, based on your screenshot, you might have a network coverage problem
settings > about phone > signal > status, what do you see?
No, See in this screenshot, I took it after mobile data on.
I found solution.
That error windows pops up because there is no internet service available, though the sim card has proper signal strength and mobile data on but if the internet service is not enable then this error is showing while enabling the hotspot. So there is no issue with phone.