I have two WP7504 modules and one has the SKU of 1103069 and the other has 1103374. Both are programmed with the same firmware and Legato code and are set for use on the AT&T network. When I try and make a voice call with the modules using a Mangoh Red board, the 1103069 works and the 1103374 doesn’t giving either an Error or No Carrier message.
Does the 103374 not have 3G fallback? If it does not, does anyone know have to decipher the SKUs so that I know which WP7504 modules to buy that have 3G fallback, as different vendors list different SKUs for the modules? Or is there a setting in the module that I can change to allow voice calls?