The slow rise of NFC (near field communication) has given rise to the idea that you can pay for purchases by doing little more than getting out your phone and tapping it at checkout. While the technology is growing, a surprising number of phones lack this feature. Thankfully there are companies out there who see this issue, and are working to correct it by offering accessories that will add NFC to your smartphone.

The first is called SDpass. This product has launched in China and works with KJava and Android devices with a built-in microSD slot. The microSD connection fits in the available slot, and is attached to a small antenna, which receives the signal. This is currently on sale for around $25, and features 2GB of storage on the SD card.

Another option that will soon be on the market is an NFC-enabled iPhone case being developed in Taiwan. It isn’t much larger than an ordinary case, with most of the bulk on the bottom, due to the connector. Since the dock connector is blocked, they have added a USB port, which will allow you to charge and sync the phone. It is currently looking to get approval from local regulators before it can be used on the market. When it receives approval, it should sell for around $51. Unfortunately there is no word on when (or if) either of these will come to the US.