Will I have internet coverage outside of Kabul (e.g., in Mazar-i-Sharif, Herat, Kandahar)?

 You must set expectations correctly. You will have reliable 4G/LTE coverage in the central "Green Zone" area of Kabul and in the main city centers of Mazar-i-Sharif and Herat. However, once you travel into rural areas or on the highways between cities, you must expect the signal to be intermittent (3G) or completely non-existent. This eSIM is for cities, not for deep field missions.