EDGE (Exchanged Data rates for GSM Evolution) is a recent development based on the GPRS system and has been classified as a '3G' standard due to the fact that it can run at up to 473.6 kbits per second. If a smartphone is EDGE compliant it can be used for heavy mobile data transmission such as receiving large email attachments and browsing complex web pages at great speed. To use EDGE cell sites must be modified to accept transmissions of this type so coverage can be patchy in certain areas- it is a technology well worth having built in to any smartphone though
Unlocking is not possible in HUAWEI E1550(3G). Those who need to use other SIM Card should download DOM CALC genrate flash code via imei to use as password for Flashing and Patch Firmware to downgrade idea customized firmware it enable your modem to use any operator's SIM Card
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