I'll log a support ticket in the evening today. This is my experience with the different Cell C bundles since I've acquired them over the last two weeks.
- Giga 20: The 5GB anytime portion. Used for about 30 hours. Works ok apart from latency spikes (usually not more than 500ms) mainly during peak evening hours but sometimes even in quiet periods (between 10pm and 12pm). Didn't have disconnects with it but had only 1 or 2 bars LTE signal.
- Giga 20: The 15GB nightowl portion. Probably tested only a couple hours over several days. A lot of the time no throughput at all even though I have a full 5 bars LTE signal. Hence not being able to test it much. Latency spikes (over 1000ms common), flatlines as well as several random disconnects experienced even in that short space of testing time.
- Giga 100: tested for about 6 hours. Similar experience to the 15GB nightowl. A lot of the time no throughput even though full signal. Latency spikes(over 1000ms common), flat-lines, disconnects are frequent.
Testing was done in a online game where I always have a latency graph running. So I could always see what was happening with my connection. Also used a longer USB cable and rearranged my PC setup so that it is closer to the window. Then hung the ZTE router on the window. Managed to get an extra bar signal for the 5GB portion (2 bars LTE). Don't know why I'm getting a different signal (full 5 bars LTE) with the 15GB nightowl portion and 100GB prepaid portion. Network experience is a lot worse with those portions though. I also forced LTE with the ZTE router. Latency on 3G and 2G is much worse from my experience so there's no point in connecting with those.