my balance is also too less,is it because of that ,that i cant use it now?

i tink youshould eat sumthing because your phone is paying tricks on you

go for a walk and find servise

Call your service provider

It could be a little improvement being made, you could try contacting service or just wait a little while or visit your mobile brand's mobile phone. They are adding something for mine, because Its happening right now to me as well!

get a service provider. If you own an advance phone, then you should get help immediately, unless of course you want to buy the new iphone. lol. if you are lucky enough, you might even know a friend who can hack? That'd be easier though. But if you really want to get it fixed, then go to the nearest service center for your phone, because that type of error is caused by mother-board interruptions. Gud luck.