When I move to a weak wifi area in the backyard the iphone will not auto switch to data.  If I turn off wifi the data works great and then when in a stronger wifi area i have to turn wifi back on.  I've tried all the suggestions...any advice helpful.  (T-mobile unlimited data service) Thanks for any advice.
	
		
			
		
		
	
				
			 
 
		 
 
		 
 
		