Vodacom can you answer this one question?

<p>Why is that whenever a Vodacom contract comes to an end , it reverts from 4G to 3G? It had 4 contracts with Vodacom and it happened to all of them! What follows, is a painful experience to get it back on 4G. Lately, I just end up going prepaid and throwing away the SIM cards even though I would have liked to keep the number. This problem is not unique to me, a quick search will reveal the extend. For this reason, I refuse to take out any more contracts with Vodacom. Thank you Vodacom for spoiling a great experience as you certainly have a great network!</p>