 shares of telecom operator bharti airtel brtins rise as much as 58 to a record high of 75595 rupees  new delhiheadquartered co said the price of its entrylevel voice plan will increase by 253 to 99 rupees 133  co also hiked prices across its unlimited voice plans and data topup plans effective nov 26  the tariff increase would likely improve overall arpu to 184 rupees and annual revenue by 120 bln rupees  nitin padmanabhan a telecom analyst at investec india  arpu or average revenue per unit is a measure of the revenue generated per user  stock on track for its best session since sept 15  about 218 mln shares change hands by 0505 gmt vs the 30day avg of about 92 mln shares  28 of the 30 analysts covering the stock have buy or strong buy ratings 2 have hold median pt 815 rupees  refinitiv data  as of last close airtel stock up 428 this year vs a 258 rise in benchmark nse nifty index 50 nsei  shares of smaller rival vodafone india vodans rise as much as 95 to 1090 rupees  the sp bse telecom index spbstlip jumps as much as 459 to a record high