Last month, Nike debuted its app-controlled Adapt BB sneaker. Now Android phone users seem to be having difficulties.

Some reviews reported the app would not connect to the right or left shoe, making it impossible for the self-lacing feature to work. After some patience and a few tries with the hard-reset, other users were able to connect the sneakers with their phones again.

According to the Verge, some of the connectivity problems are because the sneakers are being shipped with an older version of the software that is not compatible with users’ phones.

Smart-wear is becoming more common. Last week, the NBA debuted its smart jersey that is controlled through an app. The jersey allows users to change the name and number.

Nike’s Bluetooth-enabled Adapt BB app is apparently more built out for iOS. Android users can expect more updates with the app at a later date.