For the Istanbul upgrade, developers have proposed 28 official improvement proposals (EIPs) involving mining algorithms, code execution, and data storage. In the Ethereum Biweekly Developers Conference Call, core developers discussed a dozen of them in detail. However, most of the options require further discussion. Only one EIP (EIP 1108) has been temporarily approved. The proposal proposes a minor improvement to the Ethereum's Gas fee. Although the proposal was temporarily approved, the baseline data will need to be submitted at the next core developer meeting.