GWT load issues on ios 3G device

I have an IPhone 4 which I am testing my GWT app on.  In Chrome or Mobile Safari, my application will only load when connected to WIFI.  This behavior seems to be consistent, but I wanted to get a sanity check from the community to see if anyone else has experienced this?  I am using code splitting and the xsiframe linker.  My initial download size is around 100k, even with code splitting... ya I know still pretty hefty. 

My thoughts are that the cause may be related to the initial download size being too large, something weird with the xsilinker, or just something bogus that only happens with 3G.   Of note, this does not seem to occur with 4G connections. 

Any thoughts?

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