with the vod.. u alwyz have the signal strength.. but when you try making a call... booom... it shows network busy.. it takes lyk 3 to 4 attempts to make a call and the customer care service is horrible.. i had to call 4-5 tyms in 3weeks to migrate my account frm post-paid to pre-paid.. and its not yet done!!! Vodafone sucks in qatar. :-(