Giffgaff has a useful Divert on Not Reachable service which can be used to deliver calls to an alternative phone number if you're in an area which is without service.
I described it in more detail in Tips and Guides, at https://community.giffgaff.com/t5/Tips-Guides/Set-...
Sadly, you cannot set this up if you're already in the area without service, because it currently requires you to dial a short code -- which cannot be done from a phone that has no service.
The Divert on Not Reachable service itself already exists but is not widely known and most people will not already have it set up. It therefore needs to be made more accessible to those who already do not have service, so that we can usefully guide people to set it up in answer to help requests where the member is in a temporary no-service area.
Hence this labs suggestion:
- we need an alternative method to set up the destination number for Divert on Not Reachable via the member account -- which could therefore be accessed via free wifi or a desktop browser even when the mobile network service is down
- the logical place do do this seems to be https://www.giffgaff.com/call-services but any other place accessible via an internet login would be acceptable
Possible wording (I've crossed out the parts that are already there because Labs has no other useful markup -- the addition is the part that is not crossed out.
Calls Outgoing calls and texts Blocking this service stops you making any outgoing calls or sending texts, whether you’re in the UK or abroad. Incoming calls and texts Blocking this service stops you receiving all incoming calls or texts, whether you’re in the UK or abroad.
Incoming calls and texts when unreachable
Setting up a number here will deliver your incoming calls to another UK number if giffgaff cannot reach you, whether it's due to a network fault, a flat battery or a problem with your phone. There will be a charge for each diverted call, as if you had dialled the diversion yourself.
To set this up, enter the phone number of the UK diversion destination (starting with 0) : [ ]