Sprint (S) and T-Mobile (TMUS 0.57%) are fighting to raise their position in the wireless carrier space, and in the third quarter of 2014 both companies made big strides to becoming better wireless providers.

But there are plenty of headwinds for the carriers. Sprint continues to face falling subscriber numbers and is still shaking off the effects of its previously dismal network.The company just completed a massive 4G LTE upgrade for its customers, but also announced it will eliminate 2,000 jobs in order cut costs.

Meanwhile, T-Mobile has gained an amazing 10 million total customers over the past six quarters, but still earns less revenue per user than Sprint. The company continually comes out with impressive offers to attract new customers, but at some point needs to significantly increase how much it makes from each subscriber.

The real question is which carrier will be able to turn its network improvements and customer gains into a good investment for long-term investors -- and at this point the race is still wide open. Let's dive deeper into quarterly results in the below slideshow.