Unable to make recieve calls/texts - Samsung Galaxy Siii Gt-i9300 16gb Marble White Factory Unlocked Gsm I9300 S3 3g Hsdpa 850/900/1900/2100

It can be the settings issue.Click the link below to reset :----http://technoanswers.blogspot.in/2012/02/unable-to-make-calls-or-send-sms.html
--------Thanks.

Since the network 'shows' busy, it could actually mean that the network is jammed. This may allow text messages, but not calls. The problem is with the network and not your phone.
Contact your mobile service operators to know what the issue is. They could be working on the system. But if they are not, I'm sure would able to restore full network so you can make and receive calls.

Please do let me know if this helps.
Have a lovely day.

goto settings>Phone>application settings>log

set the log duration to 30 days..bingo..

if you cannot send/receive messages or send/recieve calls it usually means phone is blacklisted

dear it happens some time because of n/w problem ,if it is happening many times then contact to ur service provider

try using a different sim in your set to confirm whether it is a set problem or sim problem. If it is a set problem, restore the factory settings.

You may want to call your wireless provider to make sure they haven't blocked text messaging on your account. I had text messaging blocked on my account for a while because I had two children on my account and couldn't trust them not to run up the bill.

go to settings ---> call barring ---> then click on Data calls ----> cancel .

this should enable sms send and recieve.

the ESN is probably not activated properly on the network

have a look your security setting under settings menu and go into the call barring section to click cancel all. try it and hope it can help!