Nokia Lumia 638 vs T-Mobile myTouch 4G

Key differences

Calculated from recorded specifications using minimum difference thresholds. These are differences, not an overall ranking. For three phones, numeric highlights compare the two extremes.

• Weight

  Lumia 638: 17.1 g lighter

  Lumia 638:

  136 g

  myTouch 4G:

  153.1 g

• Width

  myTouch 4G: 5.7 mm narrower

  Lumia 638:

  66.7 mm

  myTouch 4G:

  61 mm

• Screen diagonal

  myTouch 4G: 0.7 in smaller diagonal

  Lumia 638:

  4.5 in

  myTouch 4G:

  3.8 in

• Chipset

  Lumia 638:

  Qualcomm Snapdragon 400 (28 nm)

  myTouch 4G:

  Qualcomm MSM8255 Snapdragon S2

• Depth

  Lumia 638: 1 mm thinner

  Lumia 638:

  9.2 mm

  myTouch 4G:

  10.2 mm

• Height

  myTouch 4G: 7.6 mm shorter

  Lumia 638:

  129.5 mm

  myTouch 4G:

  121.9 mm

Relative size, not calibrated actual size. Front and side outlines share one scale and a bottom baseline. Generic outlines use recorded body dimensions, excluding camera bumps.

1. 1. Lumia 638

   Height:

   129.5 mm +7.6 mm versus myTouch 4G

   Width:

   66.7 mm +5.7 mm versus myTouch 4G

   Depth:

   9.2 mm

2. 2. myTouch 4G

   Height:

   121.9 mm

   Width:

   61 mm

   Depth:

   10.2 mm +1 mm versus Lumia 638

Screen size

Approximate rectangular screens calculated from recorded diagonal and aspect ratio at one relative scale. Rounded corners and cutouts are not subtracted. These are not phone outlines or calibrated actual sizes.

1. 1. Lumia 638

   Screen diagonal:

   4.5 in

   Aspect ratio (height:width):

   16:9

   Approximate rectangular screen area:

   55.8 cm²

2. 2. myTouch 4G

   Screen diagonal:

   3.8 in

   Aspect ratio (height:width):

   5:3

   Approximate rectangular screen area:

   41.1 cm²

Lumia 638 has approximately 35.8% more rectangular screen area than myTouch 4G.

Memory variants

Each row compares the same storage capacity. Cells show recorded RAM alternatives, not combined maxima. Not recorded does not mean unavailable in every market.

Practical features

Explicit Yes and No values are shown directly. Qualified or regional records retain their details. Unknown means the record is missing.

Battery capacity

Capacity is not battery life. No endurance test is implied.

Open a section for more detail. On narrow screens, swipe sideways or use Left/Right arrow keys while the table is focused. Unknown means missing data, not No. Recorded zero values are shown as recorded.