Digital Trends – More bad news for the PlayBook: Shortly after announcing it would only be selling the Wi-Fi only version of the BlackBerry tablet until September (or when supply runs out), Sprint has also pulled plans to carry the 4G-capable device. âWe apologize for any inconvenience but the BlackBerry 4G PlayBook tablet that was announced in January for summer availability will no longer be coming to the Sprint network,â the carrier says [via WSJ].