@lizl2505 Hi welcome to giffgaff and the community
You can check here to see if there is any mast problems in your area here ⬇️
If the signal is good try doing a manual roam here ⬇️
Or here ⬇️
I would also try taking out your sim out and trying it in a friend / family members phone that is unlocked and working to establish weather or not it is the sim
I hope this helps👍🏻
Since yesterday i have had no network signal on my s8. Its always been fine.
I put the sim in an iphone and it works.
I have factory reset my s8. But, still nothing.
Can someone help me please.
@lizl2505 So the sim doesn't fully work in the iPhone?
You may have to do a sim swap.