These are the known unreleased versions for each of the new OS updates.

OS 4.x:
GSM (8000 series): 4.5.0.163
CDMA (8x30 series): 4.5.0.160
iDen (8350 series): 4.6.1.204
Pearl Flip (8220): 4.6.0.278
Pearl Flip (8230): 4.6.1.246
Gemini (8520): 4.6.1.243
Javelin (8900): 4.6.1.250
Bold (9000): 4.6.0.282
Storm (9500/9530): 4.7.0.220
Tour (9630): 4.7.1.58

OS 5.x:
GSM (8000 series): 5.0.0.53
Javelin (8900): 5.0.0.130
Bold (9000): 5.0.0.130
Onyx (9020 series): 5.0.0.149
Storm (9500/9530): 5.0.0.140
Niagara 9630 5.0.0.95
Pearl Flip (8220): 5.0.0.130
Pearl Flip (8230): 5.0.0.143
Gemini (8520): 5.0.0.70
Javelin (8900): 5.0.0.130
Bold (9000): 5.0.0.130
Tour (9630): 5.0.0.140

NOTE: The version number refers to the Applications version.

NOTE: Just because we have listed these versions here, does not necessarily mean that they are obtainable.