Early models shipped with Pocket PC 2002, but an upgrade to Windows Mobile 2003 was offered and came preinstalled on some refurbished units.

The fix is to take the unit apart and put a very small piece of electrical tape over that portion of the ribbon cable.

This requires removing both batteries, clearing all data from the device (similar to a hard reset) and delicate work in taking the unit completely apart.

All featured replaceable battery, an SD slot, fast processor and transflective liquid crystal display.

The Advanced and X3i came with a chrome finish weighted USB sync cradle that can also charge a spare battery.

The High-End X30 includes a 624 MHz processor making it the fastest Personal Digital Assistant or PDA at the time it was made.

All X30 models include a standard SD/MMC/SDIO slot, replaceable/rechargeable battery, a 3.5" QVGA TFT 16-Bit color display, and Windows Mobile 2003 Second Edition.

The X50 low-end model used an Intel XScale processor at 416 MHz, 64 MB flash ROM, and retailed for $299 USD.

The high-end device, the X50v, had a VGA screen, 624 MHz processor, 128 MB flash ROM, and retailed for $499 at the time of release.

An upgrade was offered by Dell the next year to Windows Mobile 5, however it was later withdrawn because users complained about slow performance.

[3] This update requires the PDA to be upgraded to WM5 and then uses the bootloader to flash a WM6 ROM image from an SD card.

The X51 featured: The low-end X51 has an Intel XScale processor running at 416 MHz, 128 MB flash ROM, and had a list price of $299 (before being discontinued).

The high-end X51v has a VGA screen, a 624 MHz processor, 256 MB flash ROM, and had a list price of $379.

There is or was also an attempt to design a Linux implementation (based on Kernel version 2.6) for the X50 and X51 families of Axims, but it is still in a very early stage with major hardware components and functions (such as the backlight, sound, PCMCIA/Compact Flash, Flash Memory, Wi-fi, Bluetooth and USB connectivity) inoperative.

There is a partially functional port of Google's Android operation system to the Axim x51 under the AxDroid project.