How long can you go without your cellphone/mobile phone?

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My Motorola RAZR V3X was an anniversary gift from my hubby last year. So, I've been using it for around 7 months now -- fairly new. The other day, my phone just died. I turned it on but the screen won't display as it should (it's like when you turn on the tv and nothing is shown. that's how it was). I took out the battery, put it again, then turned it on. The same thing happened. Then yesterday, strangely, I was able to use my phone. It was as if nothing was wrong. So, I thought it was already fixed. Then evening came, it died again. I turned it on and while I was keying in my PIN code, it just went off by itself. It's been like that since. Now I can't use my phone! It's been 3 days without a phone and I didn't think I'd survive. I don't know until when I'll go on without one. How about you? How long have you gone/can go on without your cellphone/mobile phone?