If the ETravelSim Peru eSIM fails to activate or you lose connection, first try the standard fixes: toggle Airplane Mode on and off, confirm Data Roaming is enabled, and verify ETravelSim is selected as the default mobile data line. If it still doesn't work, contact support via WhatsApp at +65 9236 1258, the on-site chat, or support@etravelsim.com with your order number — support is available 24/7 and prioritizes order-number queries. Refund eligibility follows the published refund policy; for unused, uninstalled eSIMs, contact support before installation to keep options open.