The description is confusing. Do you get three 12gb cards? As it says trio? Thanks

No, you do not get 3x 12gb cards. "Trio" refers to the fact that it is a Standard Size, Micro and Nano SIM card all in one - you just press out the size you need for your device.

Can this sim be topped up or should I buy two?

You can top it up with money, but you'll be charged at the non-plan rates for calls and texts. You can buy texts which don't seem to expire. 40 texts for 3 GBP. You can buy add on data, but you'll spend 25 GBP for 7 GB that EXPIRES IN 30 DAYS. So if you know you are going to use your data, buy 2 because the add on top up deal packages are NOWHERE as good as buying a new SIM with this data deal.

Will this sim card work in a mobile phone used just for data not for making calls?

I used 2x 12 Gb cards, in a smartphone, for 2 years, including in USA. Subsequently bought a 24Gb card which worked fine for a while then failed in USA. Had correspondence with 3-Mobile who said it was not for use in a phone. Conrtacted the supplier (7dayshop.com) whio said they use it in phones but subsequently confirmed via 3-mobile it was only for Tablets etc. so got a refund.

Does this have to be activated? And if so, how?

Once you use it for the first time, it is activated. I would recommend activating it in the UK or at least in Europe. The first one I bought, I used in the US for the first time and it took me hours to get it connecting.

12gb Data Sim | Desertcart Cayman Islands

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Description

🚀 Unlock freedom with 24GB of worry-free data—your ultimate on-the-go connection!

FLEXIBLE PAY AS YOU GO - No monthly bills or commitments; use data at your own pace and only pay for what you need.
STAY CONNECTED ANYWHERE - Seamlessly access ultra-fast 4G/5G data on your tablet, laptop, or MiFi device without contracts.
SECURE PRIVATE INTERNET - Avoid risky public WiFi—create your own personal hotspot wherever you go for safe, encrypted browsing.
LONG LASTING DATA VALIDITY - Enjoy up to 24 months of data validity—perfect for backup, travel, or IoT devices without expiry worries.
EFFORTLESS SETUP REAL TIME TRACKING - Plug-and-play SIM with instant activation and easy data monitoring via the 'My 3 Home' app.

The Three 24GB Pay As You Go Data SIM offers a contract-free, ultra-flexible mobile broadband solution with 4G/5G access across the UK and EU. Valid for up to 24 months from first use, it’s ideal for professionals needing reliable, secure internet on tablets, laptops, or MiFi devices. With easy setup, personal hotspot capability, and real-time data tracking, it’s the smart choice for seamless connectivity anytime, anywhere.

Specifications

ASIN	B01CMD4VKC
Best Sellers Rank	168 in Prepaid SIM Cards
Brand Name	3
Cellular Technology	5G
Customer Reviews	4.3 4.3 out of 5 stars (7,453)
EU Spare Part Availability Duration	12 Months
Global Trade Identification Number	05050553352038
Item Dimensions L x W	9L x 7.2W centimetres
Item Weight	9 g
Manufacturer	Three Mobile
Manufacturer Part Number	3TDSIM12GB
Model Number	3TDSIM12GB
Number of Items	1
Product Warranty	2 Years
Service Provider	Three
UPC	613894053542

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Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

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Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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12GB Data SIM

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