Amazon offering Prime members $50 off two newly-released Android phones, but there’s a catch …

If you’re an Amazon Prime member in the market for a low-cost unlocked Android phone, the company is offering $50 off the full retail price of two models. The budget BLU R1 HD, normally $99.99, is available for $49.99, while the 4th-gen version of the popular Moto G is down from $199.99 to $149.99.

Each phone is offered unlocked, with no commitment to a contract, giving Prime members the flexibility to switch between wireless carriers and service options to best fit their needs. The BLU R1 HD and Moto G feature Android 6.0 Marshmallow with Google Mobile Services, including Google Maps, Gmail, YouTube, and Google Play … 

For a budget phone, the BLU R1 HD has a decent-looking spec, including a 5-inch HD Gorilla Glass display and an aluminum body. 

Featuring a 1.3 GHz quad-core processor, fast 4G LTE speed, 8MP rear-facing camera, 5MP selfie camera with LED flash, 1 GB RAM and 8 GB of internal – with microSD card support for up to 64 GB of additional storage. The BLU R1 HD is compatible with GSM carriers, including AT&T and T-Mobile.

The Moto G has been one of the more popular mid-range smartphones, with a spec boost for the latest iteration. It is due for its U.S. release in a couple of weeks.

The fourth-generation Moto G is the latest premium phone from Motorola and the thinnest Moto G yet. Compatible with all major CDMA and GSM carriers, including AT&T, Sprint, T-Mobile and Verizon. It boasts a 5.5” full HD display, a Qualcomm Snapdragon 617 chipset with an octa-core processor at up to 1.5 GHz, 2 GB RAM, and 4G LTE speeds. In addition, the Moto G features a 13MP camera with dual LED flash, and a 3000 mAh battery with TurboPower charging giving you up to 6 hours of power in just 15 minutes of charging. Available with 16 GB or 32 GB of internal storage, plus microSD card support for up to 128 GB of additional storage.

There is, however, a catch: they will display lockscreen ads, much like some Kindles. They also have the Amazon apps pre-installed.

Both phones are available for pre-order starting today at www.amazon.com/prime-exclusive-phones. Amazon Prime costs $10.99/month with a 30-day free trial, so if you’re not a member but plan to buy one of these handsets, you may want to grab a free trial.

For more deals on Android smartphones and other gadgets, check out 9to5Toys.