is my ph the onley one in the last two days to have this problem

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http://forums.androidcentral.com – i just got a galaxy note second hand the first three days was going good then all of a suden i cant make or receave calls and tex messages but i can still access the net and other apps im not yousing wi fi just my ph i onley just recharged my sim have done every thing to compleat reset changed sim done every thing but throw it at the wall dose aney one know what is going on i thourght it fixed its self was abell to youse it last night till some time earley this morning and now it is happning again i no its not the sim or the net i just cant work out why my ph just says data network not avalibu (HowTos)