I got an airtel prepaid in December last year valid for 1 year, went out of India and came back again in Feb 2007 and recharged it.Now I will visit again in September and again recharge it.But after this visit I wont visit for a year I want to keep same number so I can recharge it in september 2008 when I come again.My card was issued in mid December 2006.How can I keep same number ?Thanks for any suggestions, help extended