For VOIP calls you don't need much bandwidth, but you do need low latency and low jitter. Both are pretty bad on cell-phone data connections, so it's rarely wor

For VOIP calls you don't need much bandwidth, but you do need low latency and low jitter. Both are pretty bad on cell-phone data connections, so it's rarely worth the bother. However, these comments are about providing a wifi hotspot that routes over the data connection rather than VOIP.