The best replacement for umts is hsdpa.

The best alternatives to umts are rated as following:
★★★★★  hsdpa
★★★★  gsm
★★★  wcdma
★★★  cdma
★★  gprs
★★  lte
★★  hspa
★★  evdo
★★  edge
★  dual mode
★  hsdpa faster
  aws
  gprs faster
  hspa which is faster
  wimax
  cdma2000
  ev do
  hspa+
  hsupa
  hsdpa difference
  cdma 2000
  w-cdma

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umts
hsdpa
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