Cell phone probz AGAIN!

I have (had) this Samsung Reclaim phone and it went on the blink. Literally blinking on and off when I turned it on. Brought it to Citywest and they did send it away. Now the replacement (Loner) Samsung is an older model, and I have had this for just over a month now; and this one is doing the exact same thing. Blinking on and off and will not go to the main menu…Anyone having or have this problem?