Your best bet would be to go in store and explain the problems your having. Say you saw the new dongle online uses HSDPA+ and would allow you to achieve better speeds. They would be best placed to help you find the best solution and give you a new dongle.
How did the texts work exactly? Is it through an app on the laptop you can send texts (just curious)
Edited by brandscill (Wed 15-Jan-14 22:10:39)