e mobile terminal and the base station. For example, if SISO (single input single output) gives 100 Mbit/s, then 4x4 MIMO will give 4 X 100 Mbit/s = 400 Mbit/s. Mobility of users. Higher user mobility results in lower bitrates over the same radio resources and the same mobile device, and vice versa. Therefore, speed measurements in mobile networks should be targeted at different mobility of customers, such as nomadic users (e.g. pedestrians in urban areas) and mobile users in vehicles and trains on highways and railways, respectively. Due to the above reasons it is not possible to guarantee certain specific speeds everywhere in the mobile networks. Some mobile operators for mobile data services (i.e. mobile IAS) include "up to" mobile speeds (by specifying the theoretical maximum speeds in the mobile network). Unlike mobile IAS, mobile voice has standardized bitrates (e.g. full or half rate GSM codec, adaptive multi rate (AMR) codecs), SO the availability of voice depends on the available resources in the given cell. With transition from CS voice (e.g. GSM) to VoIP with QoS guarantees (e.g. VoLTE), there is increased flexibility regarding the capacity for voice services because in such a case they are provided over the same mobile broadband and ultra-broadband access (as mobile data i.e. IAS) and hence in peak hours may use additional capacity at the expense of mobile data capacity if that significantly does not degrade mobile data speeds (which, however, 9 QoS Regulatory Framework are dependent on different factors as outlined above). VoIP with QoS guarantees (i.e. managed VoIP or specialized VoIP, which are synonyms) is serviced with higher priority than mobile data, hence it is up to network planning and dimensioning what maximum capacity will be dedicated to VoIP (e.g. VoLTE, VoIP over 5G). However, the measurements in the mobile network cannot determine the exact capacity dedicated to specialized VoIP and what is allocated to the IAS (typically the IAS capacity is based on hysteresis, which means in peak hou