Om Malik pretty much nails the challenge that such an acquisition would have. Sprint’s customer base would do wonders for T-Mobile’s ARPU. However, the company would be juggling four wide-area networks (and five altogether if you include Wi-Fi). On one hand, a WiMAX network would be an attractive asset for migrating those T-Mobile Broadband customers forward. On the other hand, T-Mobile could just shut down the expensive Xohm initiative and transition everything to LTE.