Question about cell phone radiation when there's no signal

So I read somewhere that when your cell phone doesn't have a good signal the radiation is higher as it tries to find a signal.

I'm always trying to figure out exactly what I did that I became so sensitive to emfs in the first place and I have a theory I need ya'lls help on.

I took a trip to England in 2010. My phone didn't work over there (the calling part), yet I kept it with me in my pocket or under my pillow to be able to have the time or connect to wifi when available to stay in contact with friends and family and also as an alarm clock. I was there for an entire month with my cell phone in my pocket during the day or under my pillow at night.

I am wondering that maybe since I didn't have service there due to being overseas from the US that the antenna may have been emitting at way higher levels at higher rates and maybe that is why I got sick not long after I returned from my trip.

I noticed that the longer I was there the more I became tired, and I started to become less productive and confused, however I didn't experience any other symptoms during that time. For the most part other than that I felt fine, even great.

It wasn't until I got home from my trip that I started to have more severe reactions especially to wireless home phones/cell phones and also phones and wireless at my jobs.

Does anyone know about this? It's not something I would know how to measure now. Is there a way to see exactly what kinds of levels I was exposed to while I was in England? Would an area that my phone has no service in due to a bad signal show me the same RF levels? I'm really curious because my sickness from emf was rather sudden and this might explain things. Maybe a cell phone that doesn't have a service plan might be tested for RF radiation? Does anyone have a phone that doesn't have service that could be tested?

Thanks guys!!! :)