I used Mew myetherwallet to store token ERC20 for long term https://www.myetherwallet.com but we must be carefull when access the website because many fake website of myetherwallet ( phishing website of myetherwallet) never share to any one about the private key of myetherwallet and for android wallet i used enjin wallet it is support for token ERC20 too visit the link for the wallet https://play.google.com/store/apps/details?id=com.enjin.mobile.wallet