What is the maximum speed that High Speed Packet Access (HSPA) can achieve?

High Speed Packet Access (HSPA) is a 3G mobile telecommunications technology that provides significantly improved data transmission rates compared to earlier standards. The maximum speed that HSPA can achieve is typically around 14.4 Mbps. This speed can be reached in ideal conditions, reflecting HSPA's enhancement over the initial capabilities of 3G networks.

HSPA achieves its increased data rates through various techniques, including improved modulation schemes and more efficient use of radio spectrum. This makes it suitable for applications requiring higher bandwidth, such as streaming video and large downloads.

The other speed options mentioned, such as 2 Mbps, 50 Mbps, and 144 Kbps, do not accurately reflect the capabilities of HSPA. They represent lower standards or older technologies within the mobile network domain.