MantisTech imports all dual sim mobile phones directly to the UK and we hold all our own stock. The Dual Sim phone is the answer for anyone who requires a phone to take 2 sims simultaneously. No more network coverage problems. Use your business and personal sim together. All our Quad Band Dual sim mobiles are Unlocked & Work on both Pay As You Go and Contract GSM Networks across world, eg UK works on O2, Vodaphone, Orange, T- mobile, Virgin, Tesco mobile, additionally most of our phones also accept 3G networks sims such as 3 Network. Dual Standby sim card mobile.