O2 require a minimum £10 top up in any 6 month period, but ALL unused credit remains on the sim and does not expire. O2 may disconnect the sim if you do not make a paid call or send a text at least once every three months.
eBay
Sim Card Holder SIM Card Tray For Blackview A80 Pro Sim Card Slot Holder Card Reader Adapter Replacement Parts
Aliexpress UK
2P PER TEXT. 1MB of data costs 1p (UK). Texts cost 2p each. Password: password. This is a triple sim which is standard, micro and nano sized in one. Simply snap out the size you need for your device.
eBay
Anti-lost Mobile Phone SIM Card Storage Slot With SIM Card Removal Needle Pin Both For SIM Phone Card And TF Memory Card Storage
Aliexpress UK
O2 NETWORK Sim Card Pay As You Go Trio SIM CARD 3G 4G 5G PLAN - £10 8GB 1 x Per customer.
eBay
IOT card device 4G SIM card Walkie-talkie, POS, GPS tracker, pet tracker use 72 countries universal 500MB Data support 2G/3G/4G
Aliexpress UK
The FMT300 is a highly accurate 4G tracker designed to be installed on your car battery. Just loosen the battery terminals and connect the GPS tracking device. An instruction leaflet is provided with the delivery and a link to an installation video. The SIM and full system are included. The App and Site are written by TruTrak Ltd. We won Multiple awards from the UK’s top magazine. Start immediately with 14 days free credit included, Pay As You Go, no contract, no extra costs, Covers 176 Countries including the UK and all of Europe with the SIM included, Waterproof IP65 rated.Can be fitted on a Car, Scooter, Motorbike, Trike, Quad, Plant, Trailer, Caravan and Mobile homes.
eBay
Card Slot SIM Card Adapter Card Reader (For iPhone 5/6/7/8/X/XS) Mini IM Nano Sim Card Multi-Card Reader Large Capacity
Aliexpress UK
SMARTY 3 in 1 SIM Card Nano / Micro / Standard - PAYG.
eBay
Card Slot SIM Card Adapter Card Reader (For iPhone 5/6/7/8/X/XS) Mini IM Nano Sim Card Multi-Card Reader Large Capacity
Aliexpress UK
TRIPLE SIZE SIM. MICRO & STANDARD & NANO SIM. ALL IN ONE SIM. + 500 International minutes to 29 Countries. LATEST OFFICIAL. £20 = 60 GB INTERNET + UNLIMITED TEXT & UNLIMITED CALLS. £15 = 40 GB INTERNET + UNLIMITED TEXT & UNLIMITED MINUTES.
eBay
LTE ICCID IMSI SIM Card Reader Writer Programmer 2FF 3FF 4FF 2G 3G 4G Writbale SIM +5pcs SIM blank Cards+SIM personalize Tool
Aliexpress UK
SIM card type: SIM card (small card Nano SIM card). Network type: single SIM card. Feature 5: WIFI wireless fast internet access. Watch type: 4G Android smart watch. Check if the SIM card is available.
eBay
Saudi Arabia Prepaid Sim Card；Saudi Arabia Sim / eSIM；5G/4G Internet Sim Card；Etisalat、STC Network；Saudi Abroad Travel Data Sim；
Aliexpress UK
Giffgaff 2G SIM CARD Suitable for all 2G GSM ONLY devices.
eBay
Two SIM 5G Router Unlocked WiFi6 3000Mbps Sim Card 4*LAN 2.4GHz 5Ghz 8 Antenna 5G Modem Home Hotspot Simcard WiFi Router
Aliexpress UK