@Larry

Maybe we should really investigate to confirm if the problems prevailing at Safaricom are as a result of their shift to Chinese-manufactured equipment or not - we can only make intelligent guesses at this point as these issues escalated mostly after they made that switch in equipment manufacturers. What also lends credence to that line of thinking is the fact that there are network problems that seem particular only to Safaricom which I have not experienced in rival networks, such as:
The first two are the most prevalent lately - the incidences of the latter two seem to have fallen off.

Safaricom does seem to have peculiar calling habits too!