Your phone may not show an indicator indicating that your data roaming is being done on 1x, but that is the policy for data roaming on consumer accounts. If you try a speed test while roaming, it will be pretty clear that what you are experiencing is not 3G.
Exactly. Or get an app like SignalCheck (android) and it will show the real network connection.
The roaming indicator shown on your phone is affected by a number of things, and as I recall, one of them is a setting in the PRL. For each network defined in the PRL, there is a suggestion as to what roaming indicator should be shown (i.e. 1X, 3G, LTE). And on android phones, configuration files affect what roaming indicator get shown as well.
For those interested, below is a link to current Sprint PRLs...
https://docs.google.com/spreadsheet/pub?key=0AtNVEqz3vqzmdEdWMHg2S2lxcFVJb29BRnJHdlBzdFE&output=html
Correction: In looking at a PRL template, the PRL only has a field for whether the roaming indicator should be off or on for a given network. However, the ROM can still define which indicator gets shown for which network type.
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