Even then, some patents essential to 3G might have not been declared by their patent holders. For other uses, see 3G disambiguation. Archived from the original PDF on 12 September Other countries' delays were due to the expenses of upgrading transmission hardware, especially for UMTS , whose deployment required the replacement of most broadcast towers. Wikimedia Commons has media related to 3G. Archived from the original PDF on 24 December Please help improve it to make it understandable to non-experts , without removing the technical details.
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