LG VX-8600 / AX-8600

My husband & I are trying to choose between the 8600 and the 8300 phones. One of the features he needs is the vibrate then ring. He works outside & has "lost" his phone more than once when set to vibrate. This feature allows the phone to switch to ring if not answered on vibrate. Has been crucial to finding phones.

Does either of these phones have this feature? All that shows on search is vibrate.

Any help would be greatly appreciated. Thanks much!