After many months of perfect use , I recently experienced a large number of error codes ( E3/ E4) with the Mobile and called Accuchek to replace the meter.
They have recently( December / January) changed sensitivity of the strips . Accucheck sent me a a free 50 strip pack as a replacement to try
It is important to have the " bleep" function switched on and to apply the blood unitl the bleep occurs.
I have found that this reduces the errors but I still get an unacceptable number of E4 / E3 errors 9 blood sample too low)
In terms of accuracy the meter ( at least the strips) now seems to be too sensitive to high levels ( above 12).
Accucheck need to reassess the changes they made to the strips!! I have tested the mobile against other meters and find it is not otherwise inaccurate given the limits of personal meters. I test 4 x daily as part of a weight loss regime and am Type 2 with Metformin ,Liraglutide and Novomix Insulin as therapy.