South Korean smartphone-maker LG has extended until the end of June a promotional offer in the U.S. for its G4 smartphone. The company says that anyone buying a G4 from participating retailers and carriers can receive an additional battery and microSD flash memory card for free with their phone purchase. The offer was initially supposed to end June 21.

The LG G4 promo offer includes a 3,000 mAh battery and a 32 GB SanDisk microSD that together normally sell for around $105. Also, the offer includes a battery charging cradle. According to Phone Arena, by providing $105 worth of products for free, LG is advertising two major features of the phone -- the inclusion of a memory card slot and the removable battery.

The LG G4 is a competitor of Samsung's Galaxy S6 and Apple's iPhone 6. Even though the Samsung phone sports a stunning design and is packed with features, it does not feature a microSD card slot and it includes a nonremovable battery. The iPhone 6 offers neither a removable battery nor an external microSD card slot. Hence, LG is publicizing these two features to stress that they are lacking on competitors' phones.

LG is also running another promotional offer via retailer Best Buy. Buyers of the LG G4 not only get the goodies mentioned above, but also receive a $100 gift card for free.

The LG G4 comes with a 5.5-inch IPS LCD screen that delivers a Quad HD resolution of 2560 x 1440 pixels. The LG G4 was expected to house the Snapdragon 810 chipset, but since the SoC has been in the news for thermal heating issues, it comes powered with the Snapdragon 808 chip. It is coupled with 3 GB of RAM.

There is a 16 MP camera enabled with Optical Image Stabilization (OIS) on the device. The front features a selfie camera of 8 MP. It includes a larger battery of 3,000 mAh.