I am new user to optus, i am getting "Not register on network"on S8. Try to reinsert and reset nw setting. But didt help much. Please any information on this regards will be grest help.
Thank in advance
Do you have Optus coverage in your area and was your S8 on a different network prior to using an Optus sim? Looks like you have tried a few of the suggestions I was going to make. The first link below has all the APN settings and might be worth a look. The second link is some other suggestions that also might be worth trying. Failing that possibly a full factory reset just to be sure if you are confident doing so. There is also the possibility of a dud sim that would need replacement.