I have seen this problem reported and followed the advice to manually search for a new work but no Virgin network comes up.
Phone not able to send or receive calls or texts
Does T-Mobile or Orange come up?
If not then it looks like there may be no signal.
You can check the network status here to see if their are problems
General coverage check here
Thanks for your post on the Forum. Sorry to hear that you are having problems accessing the Virgin network on your phone. Apologies as well for the delay in getting back to you.
It's great to see that enlli was able to give you some great advice and links to check your network status and area coverage.
Have you been able to get this sorted? Please let me know.
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Thanks for posting to let us know your phone is able to send and receive calls and texts now. Apologies for the inconvenience the original service problem you reported may have caused.
Please get back in touch if you have any further problems.