Hi @srejal Please check you have placed the SIM correctly in the phone. If you sure the SIM is placed correctly take the SIM out the phone and give a wipe with a dry cloth and then try again. If your still having the same issue i suggest you try the SIM in another phone to rule out a faulty device.
If your getting the similar issue then it sounds like the SIM is faulty in this case Simply order another SIM from your spread page by following this link https://giffgaff.com/orders/mgm . And when the new SIM arrives perform a SIM swap. The SIM swap process will transfer your current number and allowances e.g. goodybag and/or airtime credit over to the new SIM. The process should take no more than 30 minutes to complete and can be performed anytime between 4.30am and 9.30pm