I lost my other phone what had my Giffgaff sim and number now I got a new sim card and tried activating it and it said you cant have two sim cards active so i choose to replace my old one on my old giffgaff account and now I dont have the new number and Its not activated :/
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If you lost your sim you can do either one of the following:
1. Do a Sim Swap by following this link:
If you have a spare unactivated Giffgaff sim you can do it straightaway. If not just order a sim from your dashboard or from any banner on this forum. Giffgaff now send out hybrid sims, which contain both a standard and mirco sim that you can pop out.
Please not that Giffgaff shuts up sim swap activation between 9.30pm to 4.30am every night.
2. Report sim lost or stolen:
You'll be sent out a replacement sim ( with same number ) via first class post. All credit and goody/gigabag allowances will be transferred as well.
See here for a full guide on what you need to do should you want to put a bar on the lost sim and phone: