Nowadays in Tanzania, some telecommucation companies also known as Mobile Network Operators (MNOs) are investing heavily in mobile broadband technologies including new base stations, higher-bandwidth tower connections and new backhaul solutions to meet emerging 4G/LTE requirements. Fourth generation wireless systems(4G) are likely to reach the consumer market in another few years and it comes with the promise that it will increased bandwidth, higher speeds ,greater interoperability across communication protocols, user friendly, innovative and secure applications.However, there are a lot of challenges which might lead to fading of the expected promises. Quantitative approach was used in this study whereby exhaustive literature review of thirteen (13) papers was conducted to compare and find out the relationship between the variables. Frequency and percentage were computed to find out the results. The findings show that mobile handset incompatibility, handoff issues, security and privacy issues, quality of service support problems, high billing to customers, complex infrastructure requirement, network spectrum problems, and mobile handset expenses are the challenges which might hinder MNOs from migrating from 3G to 4G.The study recommends that before deploying 4G network systems standardized environment which will facilitate the seamless accommodation of the newly technology and therefore entrenching the possibility of gaining from the technology the enticing advantages to both users‘ and providers