I am using sony ericsson K750i. Earlier since bought I could connect internet easily. But, now I couldn't connect internet for 3 weeks. while I connect internet, a massage appear on screen "check your internet connection".... how to solve this interrupt?
If it's your wireless router, reboot it. And reboot the cell phone too (might be a software option, or holding the power button for several seconds, or worst case, pull the battery for a couple minutes). IOW, start clean and see if you can establish the connection again.