If you are travelling internationally and wish to purchase a local SIM, then you might wonder where to keep your home SIM. If you have a dual SIM phone, then you can slot it in alongside, and remain contactable on both numbers. Most smartphones however are not dual SIM, including iPhones. The solution is to use a dual SIM adapter.
Dual SIM adapters allow you to use two SIM cards in a phone that was intended for one. This avoids the annoyance of having two phones in your pocket and allows you to keep your current handset. If you want to use an iPhone with two SIMs, then this is your only option.
Dual SIM adaptors are very cheap, but some are better than others, and there are two different kinds on the market, those that are inserted into the SIM card slot, and attach to an extra SIM that is clipped on to the back of the phone, and external adaptors that are connected via Bluetooth.
Internal Dual SIM Adapter
These plug into the existing SIM slot in your phone, and allow you to add another SIM on the exterior of the phone, without adding too much bulk so that it can still fit into a case. These tend to be unique to your phone, so you need to buy one that is specific to your model.
External Dual SIM Adapter
External Bluetooth Dual SIM Adapters are the more expensive option, these are credit card-sized devices that accommodate an extra SIM, and connect it your phone via Bluetooth. This SIM is then operated through an app, which allows your phone to also be used as normal with your usual SIM. You can place the device in a separate pocket, in your wallet, or in a bag, anywhere within around 10 metres.
I have looked at the best dual SIM adapters available on the market today and picked out three key recommendations: