The Motorola Moto G, i.e. the budget smartphone that turned out to be the company's best-selling device, just got more attractive with 4G LTE and microSD support.

Motorola revolutionized the budget phone market with the introduction of its Moto G. While previously a cheap phone would entail a feature phone with not much functionality on board, the Moto G rocked some pretty good specifications for the price tag it sported.

The popular Moto G has just gotten even more attractive, as Motorola has officially introduced a 4G version of the handset with LTE support. Along with LTE connectivity and a microSD card slot for additional memory, the smartphone is now even more competitive on the budget segment of the market.

Other than these neat new additions, the Moto G remains virtually the same as the original model when it comes to design and specifications. It still allows for some degree of customization due to its interchangeable back plates, while the specs remain unchanged.

This means that the smartphone sports a 4.5-inch IPS display with 720p resolution, a 1.2GHz quad-core processor, and 1GB of RAM. The regular Moto G comes with 8GB or 16GB of internal storage capacity, while the 4G model has just 8GB of built-in storage and a microSD card slot for additional memory. Motorola offered no details on how much external storage it will support, but at least 32GB should be possible. On the software side, the handset runs Android 4.4 KitKat.

With these specifications and a budget-friendly price tag, it's no big surprise that the Moto G has been a hot seller worldwide. In India, in particular, the Moto G has been a big hit and it's one of the most recommended and sought after smartphones.

Moreover, Motorola is banking on the dirt-cheap smartphone concept and it has just launched the much-touted Moto E, which costs half the price of the Moto G. The handset has already gone official in India and the UK and it packs quite some decent features for that price point.

The 4G Moto G, meanwhile, is set to go on sale in the U.S. and the UK in the coming weeks. The smartphone will be available unlocked and SIM-free, with a price tag of $219 and £149, respectively. In terms of color options, it will sell in the usual white and black paint jobs. If you head over to Motorola's product page for the Moto G, you can now choose the 4G LTE version, but it's on pre-order for now.