The phone number 07355400830 is being used to dupe mobile phone owners in the UK. If you get a text message or a call from the number 07355400830, then you need to delete and block right away.
Communication from this number are typically initiated with a message on Whatsapp. It seems the senders dirty tactics are to targert mothers. They usually suggest that the recipient’s son has lost their phone. Pretending to be the son the scammers ask that the recipient texts them back on the number 07355400830.