拜託各位水水推薦~適合長輩用的預付卡方案？

<style type="/css"><!--td {ber: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> </style> <span data-sheets-userformat="{"2":13227,"3":{"1":0},"4":{"1":2,"2":16777215},"6":{"1":[{"1":2,"2":0,"5":{"1":2,"2":0}},{"1":0,"2":0,"3":3},{"1":1,"2":0,"4":1}]},"8":{"1":[{"1":2,"2":0,"5":{"1":2,"2":0}},{"1":0,"2":0,"3":3},{"1":1,"2":0,"4":1}]},"10":1,"11":4,"12":0,"15":"Microsoft JhengHei","16":11}" data-sheets-value="{"1":2,"2":"u6700u8fd1u8ddfu5abdu5abdu5728u8003u616eu8981u4e0du8981u5e6bu5976u5976u8fa6u4e00u652fu9580u865f u4e3bu8981u662fu8003u616eu5230u5982u679cu5979u5e73u5e38u5916u51fau8cb7u83dcu6216u662fu8ddfu670bu53cbu51fau53bbu6642 u6709u4efbu4f55u7684u4e8bu60c5u6216u662fu767cu751fu610fu5916u6642u6211u5011u80fdu53cau6642u806fu7e6bu5230u5979QQ u57fau672cu4e0au61c9u8a72u662fu6703u76f4u63a5u7d66u5976u5976u8fa6u9810u4ed8u5361u5c31u597duff0c u4e0du7136u73feu5728u4e00u822cu56fau5b9au6708u79dfu8cbbu52a0u4e0au7db2u90fdu8cb4u6851u6851uff01uff01 u60f3u554fu5404u4f4du6c34u6c34u6709u6c92u6709u63a8u85a6u54eau5bb6u96fbu4fe1u7684u9810u4ed8u5361u6bd4u8f03u512au60e0uff1f u800cu4e14u4e5fu6bd4u8f03u9069u5408u6211u5976u5976u7684u9700u6c42u5462uff1f uff08u5e73u5e38u5e7eu4e4eu6253u96fbu8a71u70bau4e3buff0cu5e7eu4e4eu6c92u6709u4e0au7db2u9700u6c42uff09"}" style="font-size:110%;font-family:Microsoft JhengHei;">最近跟媽媽在考慮要不要幫奶奶辦一支門號<br /> 主要是考慮到如果她平常外出買菜或是跟朋友出去時<br /> 有任何的事情或是發生意外時我們能及時聯繫到她QQ<br /> 基本上應該是會直接給奶奶辦預付卡就好，<br /> 不然現在一般固定月租費加上網都貴桑桑！！<br /> 想問各位水水有沒有推薦哪家電信的預付卡比較優惠？<br /> 而且也比較適合我奶奶的需求呢？<br /> （平常幾乎打電話為主，幾乎沒有上網需求）</span>