An FCC filing from HTC reveals that the rumored 10-inch Puccini tablet will be coming on AT&T 4G network.

The model is listed as Tablet Computer PG09410 with FCC. The filing also reveals that the tablet comes with LTE support and will be released on AT&T's upcoming 4G network, as the filing states that the MPR settings on the device are within 3GPP tolerance.

The 3rd Generation Partnership Project (3GPP) is an industry group which named the technology Long Term Evolution or LTE because it represents the next step (4G) in a progression from GSM, a 2G standard, to UMTS, the 3G technologies based upon GSM while 3GPP2 is a collaboration to set 3G standards for CDMA-based networks. Thus with 3GPP tolerance mentioned it is likely that it's for AT&T GSM network rather than CDMA Verizon.

Earlier reports had revealed that HTC roadmap for tablets includes the release of two 10-inch tablets in summer. HTC Puccini is touted to sport a dual-core 1.5GHz Qualcomm MSM8660 processor and is expected to run on Android 3.0.1 or Honeycomb. It is surmised that the tablet will offer 1280x800 screen resolution.

Such a tablet could surely give iPad 2 some stiff competition. The iPad 2 sports a 9.7-inch screen with 1024x768 in screen resolution. It is powered by a dual-core 1GHx A5 processor. These specifications look feeble in comparison to HTC's Puccini. However iPad 2 sports a thinner and lighter frame and thus it is to be seen if HTC can match iPad 2's 1.33 pound weight and 0.34-inch thickness.

HTC has been Apple's key rival in the smartphone segment, with Apple winning a short reprieve as the Cupertino giant availed a preliminary ruling from a U.S. trade panel that HTC infringed on two of its patents. Apple first filed a patent lawsuit infringement case against the Taiwanese phone maker in March 2010, accusing it of infringing 10 patents which Apple reduced to five patents in its most recent plea to ban import of HTC phones and tablets.

However HTC Puccini's key competitor may not be the iPad 2 but iPad 3. DigiTimes reported in June that Apple will first launch the iPad 3 and iPhone 5 in small quantities in September and will then go for a full-fledged release in September. Supply chain sources state that Apple has started sourcing parts for iPad 3 and iPhone 5. Also embedded in USB config files found in iOS 5 beta was information of two upcoming iPads coded as iPad 3,1and iPad 3,2 which allude to AT&T and Verizon model.

Also a report from Techunwrapped in June stated that iOS 5 SDK for iPad contained images double the resolution of the present ones. The iPad 2 sports a screen resolution of 1024x768. The report quoted a tipster who stated: As I was going through the iOS SDK I came across some images in the new Twitter .framework. The resolution appears to be 1,536 x 2,048.

Other rumors suggest that that iPad 3 will feature NFC-capability, Thunderbolt I/O, higher MP camera and fiber-in-matrix type material like carbon fiber reinforced plastic (CFRP) casing, instead of aluminum.